summaryrefslogtreecommitdiffstats
AgeCommit message (Collapse)AuthorFilesLines
2016-01-07qla2xxx: Move atioq to a different lock to reduce lock contentionQuinn Tran7-28/+129
99% of the time the ATIOQ has SCSI command. The other 1% of time is something else. Most of the time this interrupt does not need to hold the hardware_lock. We're moving the ATIO interrupt thread to a different lock to reduce lock contention. Signed-off-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Add selective command queuingQuinn Tran5-5/+20
queue work element to specific process lessen cache miss Signed-off-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Add irq affinity notificationQuinn Tran3-1/+93
Register to receive notification of when irq setting change occured. Signed-off-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Remove dependency on hardware_lock to reduce lock contention.Quinn Tran4-56/+106
Sessions management (add, deleted, modify) currently are serialized through the hardware_lock. Hardware_lock is a high traffic lock. This lock is accessed by both the transmit & receive sides. Sessions management is now moved off to another lock call sess_lock. This is done to reduce lock contention and increase traffic throughput. Signed-off-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Replace QLA_TGT_STATE_ABORTED with a bit.Quinn Tran2-14/+12
Replace QLA_TGT_STATE_ABORTED state with a bit because the current state of the command is lost when an abort is requested by upper layer. Signed-off-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Wait for all conflicts before ack'ing PLOGIAlexei Potashnik5-50/+180
Until now ack'ing of a new PLOGI has only been delayed if there was an existing session for the same WWN. Ack was released when the session deletion completed. If there was another WWN session with the same fc_id/loop_id pair (aka "conflicting session"), PLOGI was still ack'ed immediately. This potentially caused a problem when old session deletion logged fc_id/loop_id out of FW after new session has been established. Two work-arounds were attempted before: 1. Dropping PLOGIs until conflicting session goes away. 2. Detecting initiator being logged out of FW and issuing LOGO to force re-login. This patch introduces proper solution to the problem where PLOGI is held until either existing session with same WWN or any conflicting session goes away. Mechanism supports one session holding two PLOGI acks as well as one PLOGI ack being held by many sessions. Signed-off-by: Alexei Potashnik <alexei@purestorage.com> Acked-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Delete session if initiator is gone from FWAlexei Potashnik4-16/+104
1. Initiator A is logged in with fc_id(1)/loop_id(1) 2. Initiator A re-logs in with fc_id(2)/loop_id(2) 3. Part of old session deletion async logoout for 1/1 is queued 4. Initiator B logs in with fc_id(1)/loop_id(1), starts passing data and creates session. 5. Async logo from 3 is processed by DPC and sent to FW Now initiator B has the session but is logged out from FW. This condition is detected first with CTIO error 29 at which point we should delete current session. During session deletion we will send LOGO to initiator to force re-login. Under rare circumstances initiator might be logged out of FW, not have driver session, but still think it's logged in. E.g. the above sequence plus session deletion due to re-config. Incoming commands will fail to create local session because initiator is not found in FW. In this case we also issue LOGO to initiator to force him re-login. Finally this patch fixes exchange leak when commands where received in logged out state. In this case loop_id must be set to FFFF when corresponding exchange is terminated. The patch modifies exchange termination to always use FFFF, since in certain scenarios it's impossible to tell whether command was received in logged in or logged out state. Signed-off-by: Alexei Potashnik <alexei@purestorage.com> Acked-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Added interface to send explicit LOGO.Himanshu Madhani7-4/+253
This patch adds interface to send explicit LOGO explicit LOGO using using ELS commands from driver. Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Add FW resource count in DebugFS.Quinn Tran7-31/+81
DebugFS now will show fw_resource_count node. FW Resource count Original TGT exchg count[0] current TGT exchg count[0] original Initiator Exchange count[2048] Current Initiator Exchange count[2048] Original IOCB count[2078] Current IOCB count[2067] MAX VP count[254] MAX FCF count[0] Signed-off-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Enable Target counters in DebugFS.Himanshu Madhani6-1/+84
Following counters are added in target mode to help debugging efforts. Target Counters qla_core_sbt_cmd = 0 qla_core_ret_sta_ctio = 0 qla_core_ret_ctio = 0 core_qla_que_buf = 0 core_qla_snd_status = 0 core_qla_free_cmd = 0 num alloc iocb failed = 0 num term exchange sent = 0 num Q full sent = 0 Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Enable Exchange offload support.Himanshu Madhani6-7/+222
This patch enables Exchange offload support in Qlogic ISP. To enable exchange offload with Qlogic ISP24XX/25XX/26XX, set module parameter ql2xexchoffld to any non-zero number. This will alow ISP firmware to store exchange data structures used by firmware to host memory provided by driver. ISP firmware can supports upto 32k total active exchanges. Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-07qla2xxx: Enable Extended Logins supportHimanshu Madhani6-7/+224
This patch enables Extended Logins support in Qlogic ISP. To enable extended login with Qlogic ISP24XX/25XX/26XX, set module parameter ql2xexlogins to any non-zero number. This will alow ISP firmware to store port database structure information of remote login sessions to host memory provided by driver. ISP firmware supports upto 16k total logins. Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-06target: use offset_in_page macroGeliang Tang2-5/+5
Use offset_in_page macro instead of (addr & ~PAGE_MASK). Signed-off-by: Geliang Tang <geliangtang@163.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-06target: fix deprecated attribute names in dmesgChristophe Vu-Brugier1-1/+2
The following message is displayed in dmesg when a deprecated attribute is set: "ignoring deprecated ##_name## attribute" This patch fixes the format to include the name of the deprecated attribute. Signed-off-by: Christophe Vu-Brugier <cvubrugier@fastmail.fm> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-06target/sbc: Add LBPRZ attribute + control CDB emulationJamie Pocas6-1/+64
This change sets the LBPRZ flag in EVPD page b2h and READ CAPACITY (16) based on a new unmap_zeroes_data device attribute. This flag is set automatically for iblock based on underlying block device queue's discard_zeroes_data flag. Signed-off-by: Jamie Pocas <jamie.pocas@emc.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-06sbp-target: Remove a superfluous forward declarationBart Van Assche1-2/+0
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Chris Boot <bootc@bootc.net> Reviewed-by: Andy Grover <agrover@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-06iscsi-target: Fix indentation + spelling + unreachable codeBart Van Assche4-10/+6
Modify indentation such that the 'smatch' tool no longer complains about incorrect indentation + unreachable code. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-01-06target: Fix spelling + remove set-but-not-used variablesBart Van Assche3-11/+4
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Andy Grover <agrover@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: f_tcm: add configfs supportAndrzej Pietrasiewicz3-4/+88
Allow using the tcm function as a component of a gadget composed with ConfigFS. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: f_tcm: use usb_gstrings_attachAndrzej Pietrasiewicz1-11/+7
Do not directly use file static strings definitions in instances of f_tcm. Instead use usb_gstrings_attach. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: f_tcm: remove redundant singletonAndrzej Pietrasiewicz2-11/+0
The only instance is guaranteed with TPG_INSTANCES defined to 1. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: f_tcm: remove compatibility layerAndrzej Pietrasiewicz1-81/+6
There are no old function interface users left. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: tcm: convert to use new function registration interfaceAndrzej Pietrasiewicz2-10/+53
Convert the only user of old tcm function interface so that the old interface can be removed. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: f_tcm: convert to new function interface with backward ↵Andrzej Pietrasiewicz6-5/+339
compatibility Converting tcm to the new function interface requires converting USB tcm's function code and its users. This patch converts the f_tcm.c to the new function interface. The file can be now compiled into a separate module usb_f_tcm.ko. The old function interface is provided by means of preprocessor conditional directives. After all users are converted, the old interface can be removed. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: tcm: factor out f_tcmAndrzej Pietrasiewicz3-2129/+2148
Prepare for converting tcm to new function registration interface. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: tcm: simplify attribute store functionAndrzej Pietrasiewicz1-15/+7
Simplify function code. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: tcm: use strtobool for a boolean valueAndrzej Pietrasiewicz1-6/+4
Simplify the function. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: tcm: follow naming conventionsAndrzej Pietrasiewicz1-14/+14
Prepare for splitting tcm_usb_gadget into legacy gadget proper and f_tcm. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: tcm: split string definitions into function and deviceAndrzej Pietrasiewicz2-6/+22
Prepare for factoring out f_tcm from a legacy gadget. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20tcm_usb_gadget: Fix enabled attribute failureNicholas Bellinger1-3/+9
Fix up tcm_usbg_tpg_store_enable() return value to propagate usbg_attach() failure up to user-space if no HDC is found. Reported-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20tcm_usb_gadget: Fix nexus leakNicholas Bellinger1-0/+3
This patch adds the missing tcm_usbg_drop_nexus() to properly release tcm_usbg_nexus memory during typical ->fabric_drop_tpg() callback shutdown. Reported-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20tcm_usb_gadget: Don't strip off nexus WWPN prefixNicholas Bellinger1-1/+1
Avoid stripping off the 'naa.' I_T nexus prefix from configfs attribute store input, so that user-space will get back what it originaly wrote into ../usb_gadget/$WWPN/$TPGT/nexus. Note the SCSI initiator WWPN is purely symbolic for UAS + BOT, so it will not effect host side code. Reported-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20fs: configfs: Add unlocked version of configfs_depend_item()Krzysztof Opasiak2-0/+89
This change is necessary for the SCSI target usb gadget composed with configfs. In this case configfs will be used for two different purposes: to compose a usb gadget and to configure the target part. If an instance of tcm function is created in $CONFIGFS_ROOT/usb_gadget/<gadget>/functions a tpg can be created in $CONFIGFS_ROOT/target/usb_gadget/<wwn>/, but after a tpg is created the tcm function must not be removed until its corresponding tpg is gone. While the configfs_depend/undepend_item() are meant exactly for creating this kind of dependencies, they are not suitable if the other kernel subsystem happens to be another subsystem in configfs, so this patch adds unlocked versions meant for configfs callbacks. Above description has been provided by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> In configfs_depend_item() we have to consider two possible cases: 1) When we are called to depend another item in the same subsystem as caller In this case we should skip locking configfs root as we know that configfs is in valid state and our subsystem will not be unregistered during this call. 2) When we are called to depend item in different subsystem than our caller In this case we are also sure that configfs is in valid state but we have to lock root of configfs to avoid unregistration of target's subsystem. As it is other than caller's subsystem, there may be nothing what protects us against unregistration of that subsystem. Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20fs: configfs: Factor out configfs_find_subsys_dentry()Krzysztof Opasiak1-12/+21
configfs_depend_item() is quite complicated and should be split up into smaller functions. This also allow to share this code with other functions. Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20fs: configfs: Factor out configfs_do_depend_item()Krzysztof Opasiak1-15/+26
configfs_depend_item() is quite complicated and should be split up into smaller functions. This also allow to share this code with other functions. Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20fs: configfs: Drop unused parameter from configfs_undepend_item()Krzysztof Opasiak4-6/+6
subsys parameter is never used by configfs_undepend_item() so there is no point in passing it to this function. Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-11-29tcm_loop: Show address of tpg in configfsSheng Yang1-0/+14
In the past, the scsi_host's number wasn't shown anywhere, user have to depends on vpg_83 to find the block device, which is also depends on backstore implementation. It's better for tcm_loop to provide necessary straightforward information on locate the block device it created. This patch would help to locate the block device created by tcm_loop. The address would be shown at e.g. /sys/kernel/config/target/loopback/naa.60014059436855c1/tpgt_1/address which would looks like "2:0:1", and the lun number can be found at "/tpgt_1/lun/lun_0". Altogether they formated the scsi address of device as "2:0:1:0", which can be used to locate the device easily through 'lsscsi'. (Update to >= v4.4-rc1 configfs attribute usage - nab) Signed-off-by: Sheng Yang <sheng@yasker.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-11-22Linux 4.4-rc2v4.4-rc2Linus Torvalds1-1/+1
2015-11-22Merge branch 'akpm' (patches from Andrew)Linus Torvalds6-76/+182
Merge slub bulk allocator updates from Andrew Morton: "This missed the merge window because I was waiting for some repairs to come in. Nothing actually uses the bulk allocator yet and the changes to other code paths are pretty small. And the net guys are waiting for this so they can start merging the client code" More comments from Jesper Dangaard Brouer: "The kmem_cache_alloc_bulk() call, in mm/slub.c, were included in previous kernel. The present version contains a bug. Vladimir Davydov noticed it contained a bug, when kernel is compiled with CONFIG_MEMCG_KMEM (see commit 03ec0ed57ffc: "slub: fix kmem cgroup bug in kmem_cache_alloc_bulk"). Plus the mem cgroup counterpart in kmem_cache_free_bulk() were missing (see commit 033745189b1b "slub: add missing kmem cgroup support to kmem_cache_free_bulk"). I don't consider the fix stable-material because there are no in-tree users of the API. But with known bugs (for memcg) I cannot start using the API in the net-tree" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: slab/slub: adjust kmem_cache_alloc_bulk API slub: add missing kmem cgroup support to kmem_cache_free_bulk slub: fix kmem cgroup bug in kmem_cache_alloc_bulk slub: optimize bulk slowpath free by detached freelist slub: support for bulk free with SLUB freelists
2015-11-22Merge tag 'tty-4.4-rc2' of ↵Linus Torvalds11-13/+15
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial fixes from Greg KH: "Here are a few small tty/serial driver fixes for 4.4-rc2 that resolve some reported problems. All have been in linux-next, full details are in the shortlog below" * tag 'tty-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: serial: export fsl8250_handle_irq serial: 8250_mid: Add missing dependency tty: audit: Fix audit source serial: etraxfs-uart: Fix crash serial: fsl_lpuart: Fix earlycon support bcm63xx_uart: Use the device name when registering an interrupt tty: Fix direct use of tty buffer work tty: Fix tty_send_xchar() lock order inversion
2015-11-22Merge tag 'staging-4.4-rc2' of ↵Linus Torvalds8-64/+115
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging/IIO fixes from Greg KH: "Here are some staging and iio driver fixes for 4.4-rc2. All of these are in response to issues that have been reported and have been in linux-next for a while" * tag 'staging-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: Revert "Staging: wilc1000: coreconfigurator: Drop unneeded wrapper functions" iio: adc: xilinx: Fix VREFN scale iio: si7020: Swap data byte order iio: adc: vf610_adc: Fix division by zero error iio:ad7793: Fix ad7785 product ID iio: ad5064: Fix ad5629/ad5669 shift iio:ad5064: Make sure ad5064_i2c_write() returns 0 on success iio: lpc32xx_adc: fix warnings caused by enabling unprepared clock staging: iio: select IRQ_WORK for IIO_DUMMY_EVGEN vf610_adc: Fix internal temperature calculation
2015-11-22Merge tag 'usb-4.4-rc2' of ↵Linus Torvalds26-112/+342
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB fixes from Greg KH: "Here are a number of USB fixes and new device ids for 4.4-rc2. All have been in linux-next and the details are in the shortlog" * tag 'usb-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (28 commits) usblp: do not set TASK_INTERRUPTIBLE before lock USB: MAINTAINERS: cxacru usb: kconfig: fix warning of select USB_OTG USB: option: add XS Stick W100-2 from 4G Systems xhci: Fix a race in usb2 LPM resume, blocking U3 for usb2 devices usb: xhci: fix checking ep busy for CFC xhci: Workaround to get Intel xHCI reset working more reliably usb: chipidea: imx: fix a possible NULL dereference usb: chipidea: usbmisc_imx: fix a possible NULL dereference usb: chipidea: otg: gadget module load and unload support usb: chipidea: debug: disable usb irq while role switch ARM: dts: imx27.dtsi: change the clock information for usb usb: chipidea: imx: refine clock operations to adapt for all platforms usb: gadget: atmel_usba_udc: Expose correct device speed usb: musb: enable usb_dma parameter usb: phy: phy-mxs-usb: fix a possible NULL dereference usb: dwc3: gadget: let us set lower max_speed usb: musb: fix tx fifo flush handling usb: gadget: f_loopback: fix the warning during the enumeration usb: dwc2: host: Fix remote wakeup when not in DWC2_L2 ...
2015-11-22Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds3-3/+9
Pull MIPS fixes from Ralf Baechle: - Fix a flood of annoying build warnings - A number of fixes for Atheros 79xx platforms * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: ath79: Add a machine entry for booting OF machines MIPS: ath79: Fix the size of the MISC INTC registers in ar9132.dtsi MIPS: ath79: Fix the DDR control initialization on ar71xx and ar934x MIPS: Fix flood of warnings about comparsion being always true.
2015-11-22Merge branch 'parisc-4.4-2' of ↵Linus Torvalds17-116/+382
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc update from Helge Deller: "This patchset adds Huge Page and HUGETLBFS support for parisc" Honestly, the hugepage support should have gone through in the merge window, and is not really an rc-time fix. But it only touches arch/parisc, and I cannot find it in myself to care. If one of the three parisc users notices a breakage, I will point at Helge and make rude farting noises. * 'parisc-4.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Map kernel text and data on huge pages parisc: Add Huge Page and HUGETLBFS support parisc: Use long branch to do_syscall_trace_exit parisc: Increase initial kernel mapping to 32MB on 64bit kernel parisc: Initialize the fault vector earlier in the boot process. parisc: Add defines for Huge page support parisc: Drop unused MADV_xxxK_PAGES flags from asm/mman.h parisc: Drop definition of start_thread_som for HP-UX SOM binaries parisc: Fix wrong comment regarding first pmd entry flags
2015-11-22Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds11-35/+69
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf tool fixes from Thomas Gleixner: "A couple of fixes for perf tools: - Build system updates - Plug a memory leak in an error path of perf probe - Tear down probes correctly when adding fails - Fixes to the perf symbol handling - Fix ordering of event processing in buildid-list - Fix per DSO filtering in the histogram browser" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf probe: Clear probe_trace_event when add_probe_trace_event() fails perf probe: Fix memory leaking on failure by clearing all probe_trace_events perf inject: Also re-pipe lost_samples event perf buildid-list: Requires ordered events perf symbols: Fix dso lookup by long name and missing buildids perf symbols: Allow forcing reading of non-root owned files by root perf hists browser: The dso can be obtained from popup_action->ms.map->dso perf hists browser: Fix 'd' hotkey action to filter by DSO perf symbols: Rebuild rbtree when adjusting symbols for kcore tools: Add a "make all" rule tools: Actually install tmon in the install rule
2015-11-22Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds5-15/+53
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "This update contains: - MPX updates for handling 32bit processes - A fix for a long standing bug in 32bit signal frame handling related to FPU/XSAVE state - Handle get_xsave_addr() correctly in KVM - Fix SMAP check under paravirtualization - Add a comment to the static function trace entry to avoid further confusion about the difference to dynamic tracing" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/cpu: Fix SMAP check in PVOPS environments x86/ftrace: Add comment on static function tracing x86/fpu: Fix get_xsave_addr() behavior under virtualization x86/fpu: Fix 32-bit signal frame handling x86/mpx: Fix 32-bit address space calculation x86/mpx: Do proper get_user() when running 32-bit binaries on 64-bit kernels
2015-11-22slab/slub: adjust kmem_cache_alloc_bulk APIJesper Dangaard Brouer6-11/+11
Adjust kmem_cache_alloc_bulk API before we have any real users. Adjust API to return type 'int' instead of previously type 'bool'. This is done to allow future extension of the bulk alloc API. A future extension could be to allow SLUB to stop at a page boundary, when specified by a flag, and then return the number of objects. The advantage of this approach, would make it easier to make bulk alloc run without local IRQs disabled. With an approach of cmpxchg "stealing" the entire c->freelist or page->freelist. To avoid overshooting we would stop processing at a slab-page boundary. Else we always end up returning some objects at the cost of another cmpxchg. To keep compatible with future users of this API linking against an older kernel when using the new flag, we need to return the number of allocated objects with this API change. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-22slub: add missing kmem cgroup support to kmem_cache_free_bulkJesper Dangaard Brouer1-1/+5
Initial implementation missed support for kmem cgroup support in kmem_cache_free_bulk() call, add this. If CONFIG_MEMCG_KMEM is not enabled, the compiler should be smart enough to not add any asm code. Incoming bulk free objects can belong to different kmem cgroups, and object free call can happen at a later point outside memcg context. Thus, we need to keep the orig kmem_cache, to correctly verify if a memcg object match against its "root_cache" (s->memcg_params.root_cache). Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-22slub: fix kmem cgroup bug in kmem_cache_alloc_bulkJesper Dangaard Brouer1-18/+22
The call slab_pre_alloc_hook() interacts with kmemgc and is not allowed to be called several times inside the bulk alloc for loop, due to the call to memcg_kmem_get_cache(). This would result in hitting the VM_BUG_ON in __memcg_kmem_get_cache. As suggested by Vladimir Davydov, change slab_post_alloc_hook() to be able to handle an array of objects. A subtle detail is, loop iterator "i" in slab_post_alloc_hook() must have same type (size_t) as size argument. This helps the compiler to easier realize that it can remove the loop, when all debug statements inside loop evaluates to nothing. Note, this is only an issue because the kernel is compiled with GCC option: -fno-strict-overflow In slab_alloc_node() the compiler inlines and optimizes the invocation of slab_post_alloc_hook(s, flags, 1, &object) by removing the loop and access object directly. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reported-by: Vladimir Davydov <vdavydov@virtuozzo.com> Suggested-by: Vladimir Davydov <vdavydov@virtuozzo.com> Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-22slub: optimize bulk slowpath free by detached freelistJesper Dangaard Brouer1-30/+79
This change focus on improving the speed of object freeing in the "slowpath" of kmem_cache_free_bulk. The calls slab_free (fastpath) and __slab_free (slowpath) have been extended with support for bulk free, which amortize the overhead of the (locked) cmpxchg_double. To use the new bulking feature, we build what I call a detached freelist. The detached freelist takes advantage of three properties: 1) the free function call owns the object that is about to be freed, thus writing into this memory is synchronization-free. 2) many freelist's can co-exist side-by-side in the same slab-page each with a separate head pointer. 3) it is the visibility of the head pointer that needs synchronization. Given these properties, the brilliant part is that the detached freelist can be constructed without any need for synchronization. The freelist is constructed directly in the page objects, without any synchronization needed. The detached freelist is allocated on the stack of the function call kmem_cache_free_bulk. Thus, the freelist head pointer is not visible to other CPUs. All objects in a SLUB freelist must belong to the same slab-page. Thus, constructing the detached freelist is about matching objects that belong to the same slab-page. The bulk free array is scanned is a progressive manor with a limited look-ahead facility. Kmem debug support is handled in call of slab_free(). Notice kmem_cache_free_bulk no longer need to disable IRQs. This only slowed down single free bulk with approx 3 cycles. Performance data: Benchmarked[1] obj size 256 bytes on CPU i7-4790K @ 4.00GHz SLUB fastpath single object quick reuse: 47 cycles(tsc) 11.931 ns To get stable and comparable numbers, the kernel have been booted with "slab_merge" (this also improve performance for larger bulk sizes). Performance data, compared against fallback bulking: bulk - fallback bulk - improvement with this patch 1 - 62 cycles(tsc) 15.662 ns - 49 cycles(tsc) 12.407 ns- improved 21.0% 2 - 55 cycles(tsc) 13.935 ns - 30 cycles(tsc) 7.506 ns - improved 45.5% 3 - 53 cycles(tsc) 13.341 ns - 23 cycles(tsc) 5.865 ns - improved 56.6% 4 - 52 cycles(tsc) 13.081 ns - 20 cycles(tsc) 5.048 ns - improved 61.5% 8 - 50 cycles(tsc) 12.627 ns - 18 cycles(tsc) 4.659 ns - improved 64.0% 16 - 49 cycles(tsc) 12.412 ns - 17 cycles(tsc) 4.495 ns - improved 65.3% 30 - 49 cycles(tsc) 12.484 ns - 18 cycles(tsc) 4.533 ns - improved 63.3% 32 - 50 cycles(tsc) 12.627 ns - 18 cycles(tsc) 4.707 ns - improved 64.0% 34 - 96 cycles(tsc) 24.243 ns - 23 cycles(tsc) 5.976 ns - improved 76.0% 48 - 83 cycles(tsc) 20.818 ns - 21 cycles(tsc) 5.329 ns - improved 74.7% 64 - 74 cycles(tsc) 18.700 ns - 20 cycles(tsc) 5.127 ns - improved 73.0% 128 - 90 cycles(tsc) 22.734 ns - 27 cycles(tsc) 6.833 ns - improved 70.0% 158 - 99 cycles(tsc) 24.776 ns - 30 cycles(tsc) 7.583 ns - improved 69.7% 250 - 104 cycles(tsc) 26.089 ns - 37 cycles(tsc) 9.280 ns - improved 64.4% Performance data, compared current in-kernel bulking: bulk - curr in-kernel - improvement with this patch 1 - 46 cycles(tsc) - 49 cycles(tsc) - improved (cycles:-3) -6.5% 2 - 27 cycles(tsc) - 30 cycles(tsc) - improved (cycles:-3) -11.1% 3 - 21 cycles(tsc) - 23 cycles(tsc) - improved (cycles:-2) -9.5% 4 - 18 cycles(tsc) - 20 cycles(tsc) - improved (cycles:-2) -11.1% 8 - 17 cycles(tsc) - 18 cycles(tsc) - improved (cycles:-1) -5.9% 16 - 18 cycles(tsc) - 17 cycles(tsc) - improved (cycles: 1) 5.6% 30 - 18 cycles(tsc) - 18 cycles(tsc) - improved (cycles: 0) 0.0% 32 - 18 cycles(tsc) - 18 cycles(tsc) - improved (cycles: 0) 0.0% 34 - 78 cycles(tsc) - 23 cycles(tsc) - improved (cycles:55) 70.5% 48 - 60 cycles(tsc) - 21 cycles(tsc) - improved (cycles:39) 65.0% 64 - 49 cycles(tsc) - 20 cycles(tsc) - improved (cycles:29) 59.2% 128 - 69 cycles(tsc) - 27 cycles(tsc) - improved (cycles:42) 60.9% 158 - 79 cycles(tsc) - 30 cycles(tsc) - improved (cycles:49) 62.0% 250 - 86 cycles(tsc) - 37 cycles(tsc) - improved (cycles:49) 57.0% Performance with normal SLUB merging is significantly slower for larger bulking. This is believed to (primarily) be an effect of not having to share the per-CPU data-structures, as tuning per-CPU size can achieve similar performance. bulk - slab_nomerge - normal SLUB merge 1 - 49 cycles(tsc) - 49 cycles(tsc) - merge slower with cycles:0 2 - 30 cycles(tsc) - 30 cycles(tsc) - merge slower with cycles:0 3 - 23 cycles(tsc) - 23 cycles(tsc) - merge slower with cycles:0 4 - 20 cycles(tsc) - 20 cycles(tsc) - merge slower with cycles:0 8 - 18 cycles(tsc) - 18 cycles(tsc) - merge slower with cycles:0 16 - 17 cycles(tsc) - 17 cycles(tsc) - merge slower with cycles:0 30 - 18 cycles(tsc) - 23 cycles(tsc) - merge slower with cycles:5 32 - 18 cycles(tsc) - 22 cycles(tsc) - merge slower with cycles:4 34 - 23 cycles(tsc) - 22 cycles(tsc) - merge slower with cycles:-1 48 - 21 cycles(tsc) - 22 cycles(tsc) - merge slower with cycles:1 64 - 20 cycles(tsc) - 48 cycles(tsc) - merge slower with cycles:28 128 - 27 cycles(tsc) - 57 cycles(tsc) - merge slower with cycles:30 158 - 30 cycles(tsc) - 59 cycles(tsc) - merge slower with cycles:29 250 - 37 cycles(tsc) - 56 cycles(tsc) - merge slower with cycles:19 Joint work with Alexander Duyck. [1] https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/mm/slab_bulk_test01.c [akpm@linux-foundation.org: BUG_ON -> WARN_ON;return] Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Acked-by: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 08:59:48 +0000