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2008-11-11Merge branch 'master' of ↵David S. Miller86-2393/+5619
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/message/fusion/mptlan.c drivers/net/sfc/ethtool.c net/mac80211/debugfs_sta.c
2008-11-11Merge branch 'timers-fixes-for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: timers: handle HRTIMER_CB_IRQSAFE_UNLOCKED correctly from softirq context nohz: disable tick_nohz_kick_tick() for now irq: call __irq_enter() before calling the tick_idle_check x86: HPET: enter hpet_interrupt_handler with interrupts disabled x86: HPET: read from HPET_Tn_CMP() not HPET_T0_CMP x86: HPET: convert WARN_ON to WARN_ON_ONCE
2008-11-11Merge branch 'merge' of ↵Linus Torvalds63-2259/+5291
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: powerpc: Update desktop/server defconfigs powerpc: Fix msr check in compat_sys_swapcontext powerpc: Repair device bindings documentation powerpc: Updated Freescale PPC related defconfigs powerpc: Update QE/CPM2 usb_ctlr structures for USB support powerpc/86xx: Correct SOC bus-frequency in GE Fanuc SBC610 DTS powerpc: Fix Book-E watchdog timer interval setting powerpc/fsl-booke: Fix synchronization bug w/local tlb invalidates
2008-11-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2-38/+195
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc64: Update defconfig. Revert "sparc: correct section of current_pc()"
2008-11-11powerpc: Update desktop/server defconfigsPaul Mackerras8-313/+1033
Turned off CONFIG_PCI_LEGACY and turned on EXT4, and otherwise mostly took the defaults. This also updates ppc6xx_defconfig, which covers the 6xx/7xx/7xxx-based embedded boards. Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-11powerpc: Fix msr check in compat_sys_swapcontextAndreas Schwab1-3/+15
The new context may not be 16-byte aligned, so the real address of the mcontext structure should be read from the uc_regs pointer instead of directly using the (unaligned) uc_mcontext field. Signed-off-by: Andreas Schwab <schwab@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-10x86: Make NUMA on 32-bit depend on BROKENRafael J. Wysocki1-1/+1
While investigating the failure of hibernation on 32-bit x86 with CONFIG_NUMA set, as described in this message http://marc.info/?l=linux-kernel&m=122634118116226&w=4 I asked some people for help and I was told that it wasn't really worth the effort, because CONFIG_NUMA was generally broken on 32-bit x86 systems and it shouldn't be used in such configs. For this reason, make CONFIG_NUMA depend on BROKEN instead of EXPERIMENTAL on x86-32. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Andi Kleen <andi@firstfloor.org> Cc: Pavel Machek <pavel@suse.cz> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-10sparc64: Update defconfig.David S. Miller1-37/+195
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-10Revert "sparc: correct section of current_pc()"David S. Miller1-1/+0
This reverts commit 8dd9453737822469837d48d5da3785ce70fb2118. This fixes a boot failure reported by Robert Reif. The code above the section change expects to fallthrough, so we can't make such a section change here.
2008-11-10x86: HPET: enter hpet_interrupt_handler with interrupts disabledMatt Fleming1-1/+1
Some functions that may be called from this handler require that interrupts are disabled. Also, combining IRQF_DISABLED and IRQF_SHARED does not reliably disable interrupts in a handler, so remove IRQF_SHARED from the irq flags (this irq is not shared anyway). Signed-off-by: Matt Fleming <mjf@gentoo.org> Cc: mingo@elte.hu Cc: venkatesh.pallipadi@intel.com Cc: "Will Newton" <will.newton@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-11-10x86: HPET: read from HPET_Tn_CMP() not HPET_T0_CMPMatt Fleming1-1/+1
In hpet_next_event() we check that the value we just wrote to HPET_Tn_CMP(timer) has reached the chip. Currently, we're checking that the value we wrote to HPET_Tn_CMP(timer) is in HPET_T0_CMP, which, if timer is anything other than timer 0, is likely to fail. Signed-off-by: Matt Fleming <mjf@gentoo.org> Cc: mingo@elte.hu Cc: venkatesh.pallipadi@intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-11-10x86: HPET: convert WARN_ON to WARN_ON_ONCEMatt Fleming1-1/+1
It is possible to flood the console with call traces if the WARN_ON condition is true because of the frequency with which this function is called. Signed-off-by: Matt Fleming <mjf@gentoo.org> Cc: mingo@elte.hu Cc: venkatesh.pallipadi@intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-11-08powerpc: Updated Freescale PPC related defconfigsKumar Gala50-1932/+4234
unset CONFIG_PCI_LEGACY in the defconfigs as none of them enable ISDN drivers which seem to be the only place we are using pci_find_device Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-11-08powerpc: Update QE/CPM2 usb_ctlr structures for USB supportLi Yang2-10/+4
Fixes following build error: CC drivers/usb/gadget/fsl_qe_udc.o drivers/usb/gadget/fsl_qe_udc.c: In function 'qe_eprx_stall_change': drivers/usb/gadget/fsl_qe_udc.c:156: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c:163: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c: In function 'qe_eptx_stall_change': drivers/usb/gadget/fsl_qe_udc.c:173: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c:180: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c: In function 'qe_eprx_nack': drivers/usb/gadget/fsl_qe_udc.c:201: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c:201: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c: In function 'qe_eprx_normal': drivers/usb/gadget/fsl_qe_udc.c:218: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c:218: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c: In function 'qe_ep_reset': drivers/usb/gadget/fsl_qe_udc.c:325: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c:342: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c: In function 'qe_ep_register_init': drivers/usb/gadget/fsl_qe_udc.c:515: error: 'struct usb_ctlr' has no member named 'usb_usep' drivers/usb/gadget/fsl_qe_udc.c: In function 'ch9getstatus': drivers/usb/gadget/fsl_qe_udc.c:1981: error: 'struct usb_ctlr' has no member named 'usb_usep' make[2]: *** [drivers/usb/gadget/fsl_qe_udc.o] Error 1 Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-11-08powerpc/86xx: Correct SOC bus-frequency in GE Fanuc SBC610 DTSMartyn Welch1-1/+1
This patch corrects the bus-frequency value provided in the SBC610's dts. Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-11-08powerpc/fsl-booke: Fix synchronization bug w/local tlb invalidatesKumar Gala1-0/+4
The implemetation of _tlbil_pid() on Freescale Book-E cores needs an msync & isync after we flash invalidate the TLBs. This was causing the following oops reported by Sebastian Andrzej Siewior: VFS: Mounted root (nfs filesystem) readonly. Freeing unused kernel memory: 148k init BUG: sleeping function called from invalid context at /home/bigeasy/git/linux-2.6-powerpc/mm/mmap.c:234 in_atomic():1, irqs_disabled():0 Call Trace: [df189df0] [c0007160] show_stack+0x48/0x148 (unreliable) [df189e30] [c0029480] __might_sleep+0xf0/0x100 [df189e40] [c0070ac0] remove_vma+0x28/0x98 [df189e50] [c0070c1c] exit_mmap+0xec/0x128 [df189e80] [c002d2f4] mmput+0x54/0xec [df189ea0] [c0030b6c] exit_mm+0x10c/0x120 [df189ed0] [c003288c] do_exit+0x1ac/0x6e8 [df189f20] [c0032e48] do_group_exit+0x80/0xac [df189f40] [c000e9dc] ret_from_syscall+0x0/0x3c BUG: scheduling while atomic: udevd/956/0x10000002 Modules linked in: Call Trace: [df189df0] [c0007160] show_stack+0x48/0x148 (unreliable) [df189e30] [c002ac88] __schedule_bug+0x58/0x6c [df189e40] [c023e6cc] schedule+0xa8/0x4a8 [df189e90] [c002ad6c] __cond_resched+0x38/0x64 [df189ea0] [c023ebc8] _cond_resched+0x3c/0x58 [df189eb0] [c0030e70] put_files_struct+0x90/0xec [df189ed0] [c00328a8] do_exit+0x1c8/0x6e8 [df189f20] [c0032e48] do_group_exit+0x80/0xac [df189f40] [c000e9dc] ret_from_syscall+0x0/0x3c Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-11-08Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds3-4/+8
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: optimize sched_clock() a bit sched: improve sched_clock() performance
2008-11-08sched: optimize sched_clock() a bitIngo Molnar1-1/+1
sched_clock() uses cycles_2_ns() needlessly - which is an irq-disabling variant of __cycles_2_ns(). Most of the time sched_clock() is called with irqs disabled already. The few places that call it with irqs enabled need to be updated. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-08sched: improve sched_clock() performanceIngo Molnar2-3/+7
in scheduler-intense workloads native_read_tsc() overhead accounts for 20% of the system overhead: 659567 system_call 41222.9375 686796 schedule 435.7843 718382 __switch_to 665.1685 823875 switch_mm 4526.7857 1883122 native_read_tsc 55385.9412 9761990 total 2.8468 this is large part due to the rdtsc_barrier() that is done before and after reading the TSC. But sched_clock() is not a precise clock in the GTOD sense, using such barriers is completely pointless. So remove the barriers and only use them in vget_cycles(). This improves lat_ctx performance by about 5%. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-07Merge branch 'oprofile-for-tip' of ↵Ingo Molnar2-6/+5
git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile into x86/urgent
2008-11-07Merge branch 'release' of ↵Linus Torvalds12-76/+106
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Reserve elfcorehdr memory in CONFIG_CRASH_DUMP [IA64] fix boot panic caused by offline CPUs [IA64] reorder Kconfig options to match x86 [IA64] Build VT-D iommu support into generic kernel [IA64] remove dead BIO_VMERGE_BOUNDARY definition [IA64] remove duplicated #include from pci-dma.c [IA64] use common header for software IO/TLB [IA64] fix the difference between node_mem_map and node_start_pfn [IA64] Add error_recovery_info field to SAL section header [IA64] Add UV watchlist support. [IA64] Simplify SGI uv vs. sn2 driver issues
2008-11-07[IA64] Reserve elfcorehdr memory in CONFIG_CRASH_DUMPJay Lan1-1/+1
IA64 kdump kernel failed to initialize /proc/vmcore in 2.6.28-rc2. A bug was introduced in this patch commit: d9a9855d0b06ca6d6cc92596fedcc03f8512e062 always reserve elfcore header memory in crash kernel The problem was that the call to reserve_elfcorehdr() should be placed in CONFIG_CRASH_DUMP rather than in CONFIG_CRASH_KERNEL, which does not exist. Signed-off-by: Jay Lan <jlan@sgi.com> Acked-by: Simon Hormon <horms@verge.net.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-07Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, xen: fix use of pgd_page now that it really does return a page
2008-11-07oprofile: Fix p6 counter overflow checkAndi Kleen1-5/+4
Fix the counter overflow check for CPUs with counter width > 32 I had a similar change in a different patch that I didn't submit and I didn't notice the problem earlier because it was always tested together. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2008-11-07xen: make sure stray alias mappings are gone before pinningJeremy Fitzhardinge2-5/+9
Xen requires that all mappings of pagetable pages are read-only, so that they can't be updated illegally. As a result, if a page is being turned into a pagetable page, we need to make sure all its mappings are RO. If the page had been used for ioremap or vmalloc, it may still have left over mappings as a result of not having been lazily unmapped. This change makes sure we explicitly mop them all up before pinning the page. Unlike aliases created by kmap, the there can be vmalloc aliases even for non-high pages, so we must do the flush unconditionally. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Linux Memory Management List <linux-mm@kvack.org> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06Merge branch 'master' of ↵David S. Miller479-2534/+65701
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/ath5k/base.c net/8021q/vlan_core.c
2008-11-06Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds12-32/+39
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: Revert "x86: default to reboot via ACPI" x86: align DirectMap in /proc/meminfo AMD IOMMU: fix lazy IO/TLB flushing in unmap path x86: add smp_mb() before sending INVALIDATE_TLB_VECTOR x86: remove VISWS and PARAVIRT around NR_IRQS puzzle x86: mention ACPI in top-level Kconfig menu x86: size NR_IRQS on 32-bit systems the same way as 64-bit x86: don't allow nr_irqs > NR_IRQS x86/docs: remove noirqbalance param docs x86: don't use tsc_khz to calculate lpj if notsc is passed x86, voyager: fix smp_intr_init() compile breakage AMD IOMMU: fix detection of NP capable IOMMUs
2008-11-06Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds11-67/+122
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] xsc3: fix xsc3_l2_inv_range [ARM] mm: fix page table initialization [ARM] fix naming of MODULE_START / MODULE_END ARM: OMAP: Fix define for twl4030 irqs ARM: OMAP: Fix get_irqnr_and_base to clear spurious interrupt bits ARM: OMAP: Fix debugfs_create_*'s error checking method for arm/plat-omap ARM: OMAP: Fix compiler warnings in gpmc.c [ARM] fix VFP+softfloat binaries
2008-11-06Merge branch 'merge' of ↵Linus Torvalds2-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: powerpc: Fix "unused variable" warning in pci_dlpar.c powerpc/cell: Fix compile error in ras.c powerpc/ps3: Fix compile error in ps3-lpm.c
2008-11-06x86, xen: fix use of pgd_page now that it really does return a pageJeremy Fitzhardinge1-2/+2
Impact: fix 32-bit Xen guest boot crash On 32-bit PAE, pud_page, for no good reason, didn't really return a struct page *. Since Jan Beulich's fix "i386/PAE: fix pud_page()", pud_page does return a struct page *. Because PAE has 3 pagetable levels, the pud level is folded into the pgd level, so pgd_page() is the same as pud_page(), and now returns a struct page *. Update the xen/mmu.c code which uses pgd_page() accordingly. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06Merge branch 'omap-fixes' of ↵Russell King4-16/+16
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
2008-11-06Merge branch 'fixes' of ↵Russell King1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/xscaleiop
2008-11-06[ARM] xsc3: fix xsc3_l2_inv_rangeDan Williams1-2/+2
When 'start' and 'end' are less than a cacheline apart and 'start' is unaligned we are done after cleaning and invalidating the first cacheline. So check for (start < end) which will not walk off into invalid address ranges when (start > end). This issue was caught by drivers/dma/dmatest. 2.6.27 is susceptible. Cc: <stable@kernel.org> Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: Lothar WaÃ<9f>mann <LW@KARO-electronics.de> Cc: Lennert Buytenhek <buytenh@marvell.com> Cc: Eric Miao <eric.miao@marvell.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-11-06[ARM] mm: fix page table initializationRussell King3-36/+87
As a result of the ptebits changes, we ended up marking device mappings as normal memory on ARMv7 CPUs, resulting in undesirable behaviour with serial ports and the like. While reviewing the section mapping table entries, other errors in the memory type settings for devices were detected and confirmed to prevent Xscale3 platforms booting. Tested on: OMAP34xx (ARMv7), OMAP24xx (ARMv6), OMAP16xx (ARM926T, ARMv5), PXA311 (Xscale3), PXA272 (Xscale), PXA255 (Xscale), IXP42x (Xscale), S3C2410 (ARM920T, ARMv4T), ARM720T (ARMv4T) StrongARM-110 (ARMv4) Acked-by: Tony Lindgren <tony@atomide.com> Tested-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Mike Rapoport <mike@compulab.co.il> Tested-by: Ben Dooks <ben-linux@fluff.org> Tested-by: Anders Grafström <grfstrm@users.sourceforge.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-06[IA64] fix boot panic caused by offline CPUsDoug Chapman2-8/+28
This fixes a regression introduced by 2c6e6db41f01b6b4eb98809350827c9678996698 "Minimize per_cpu reservations." That patch incorrectly used information about what CPUs are possible that was not yet initialized by ACPI. The end result was that per_cpu structures for offline CPUs were not initialized causing a NULL pointer reference. Since we cannot do the full acpi_boot_init() call any earlier, the simplest fix is to just parse the MADT for SAPIC entries early to find the CPU info. This should also allow for some cleanup of the code added by the "Minimize per_cpu reservations". This patch just fixes the regressions, the cleanup will come in a later patch. Signed-off-by: Doug Chapman <doug.chapman@hp.com> Signed-off-by: Alex Chiang <achiang@hp.com> CC: Robin Holt <holt@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-06[IA64] reorder Kconfig options to match x86Bjorn Helgaas1-9/+9
No functional change, just reorder some config options and update the "Power management and ACPI" label to match the defacto x86 standard. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-11-06[ARM] fix naming of MODULE_START / MODULE_ENDRussell King3-12/+12
As of 73bdf0a60e607f4b8ecc5aec597105976565a84f, the kernel needs to know where modules are located in the virtual address space. On ARM, we located this region between MODULE_START and MODULE_END. Unfortunately, everyone else calls it MODULES_VADDR and MODULES_END. Update ARM to use the same naming, so is_vmalloc_or_module_addr() can work properly. Also update the comment on mm/vmalloc.c to reflect that ARM also places modules in a separate region from the vmalloc space. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-06Revert "x86: default to reboot via ACPI"Eduardo Habkost1-5/+1
This reverts commit c7ffa6c26277b403920e2255d10df849bd613380. the assumptio of this change was that this would not break any existing machine. Andrey Borzenkov reported troubles with the ACPI reboot method: the system would hang on reboot, necessiating a power cycle. Probably more systems are affected as well. Also, there are patches queued up for v2.6.29 to disable virtualization on emergency_restart() - which was the original motivation of this change. Reported-by: Andrey Borzenkov <arvidjaar@mail.ru> Bisected-by: Andrey Borzenkov <arvidjaar@mail.ru> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Acked-by: Avi Kivity <avi@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: align DirectMap in /proc/meminfoHugh Dickins1-4/+4
Impact: right-align /proc/meminfo consistent with other fields When the split-LRU patches added Inactive(anon) and Inactive(file) lines to /proc/meminfo, all counts were moved two columns rightwards to fit in. Now move x86's DirectMap lines two columns rightwards to line up. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06Merge branch 'iommu-fixes-2.6.28' of ↵Ingo Molnar1-2/+7
git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent
2008-11-06AMD IOMMU: fix lazy IO/TLB flushing in unmap pathJoerg Roedel1-1/+6
Lazy flushing needs to take care of the unmap path too which is not yet implemented and leads to stale IO/TLB entries. This is fixed by this patch. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-11-06x86: add smp_mb() before sending INVALIDATE_TLB_VECTORSuresh Siddha2-0/+11
Impact: fix rare x2apic hang On x86, x2apic mode accesses for sending IPI's don't have serializing semantics. If the IPI receivner refers(in lock-free fashion) to some memory setup by the sender, the need for smp_mb() before sending the IPI becomes critical in x2apic mode. Add the smp_mb() in native_flush_tlb_others() before sending the IPI. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: remove VISWS and PARAVIRT around NR_IRQS puzzleYinghai Lu1-3/+3
Impact: fix warning message when PARAVIRT is set in config Remove stale #ifdef components from our IRQ sizing logic. x86/Voyager is the only holdout. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: mention ACPI in top-level Kconfig menuBjorn Helgaas1-1/+1
Impact: clarify menuconfig text Mention ACPI in the top-level menu to give a clue as to where it lives. This matches what ia64 does. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: size NR_IRQS on 32-bit systems the same way as 64-bitYinghai Lu1-14/+6
Impact: make NR_IRQS big enough for system with lots of apic/pins If lots of IO_APIC's are there (or can be there), size the same way as 64-bit, depending on MAX_IO_APICS and NR_CPUS. This fixes the boot problem reported by Ben Hutchings on a 32-bit server with 5 IO-APICs and 240 IO-APIC pins. Signed-off-by: Yinghai <yinghai@kernel.org> Tested-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: don't allow nr_irqs > NR_IRQSBen Hutchings1-0/+2
Impact: fix boot hang on 32-bit systems with more than 224 IO-APIC pins On some 32-bit systems with a lot of IO-APICs probe_nr_irqs() can return a value larger than NR_IRQS. This will lead to probe_irq_on() overrunning the irq_desc array. I hit this when running net-next-2.6 (close to 2.6.28-rc3) on a Supermicro dual Xeon system. NR_IRQS is 224 but probe_nr_irqs() detects 5 IOAPICs and returns 240. Here are the log messages: Tue Nov 4 16:53:47 2008 ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0]) Tue Nov 4 16:53:47 2008 IOAPIC[0]: apic_id 1, version 32, address 0xfec00000, GSI 0-23 Tue Nov 4 16:53:47 2008 ACPI: IOAPIC (id[0x02] address[0xfec81000] gsi_base[24]) Tue Nov 4 16:53:47 2008 IOAPIC[1]: apic_id 2, version 32, address 0xfec81000, GSI 24-47 Tue Nov 4 16:53:47 2008 ACPI: IOAPIC (id[0x03] address[0xfec81400] gsi_base[48]) Tue Nov 4 16:53:47 2008 IOAPIC[2]: apic_id 3, version 32, address 0xfec81400, GSI 48-71 Tue Nov 4 16:53:47 2008 ACPI: IOAPIC (id[0x04] address[0xfec82000] gsi_base[72]) Tue Nov 4 16:53:47 2008 IOAPIC[3]: apic_id 4, version 32, address 0xfec82000, GSI 72-95 Tue Nov 4 16:53:47 2008 ACPI: IOAPIC (id[0x05] address[0xfec82400] gsi_base[96]) Tue Nov 4 16:53:47 2008 IOAPIC[4]: apic_id 5, version 32, address 0xfec82400, GSI 96-119 Tue Nov 4 16:53:47 2008 ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 high edge) Tue Nov 4 16:53:47 2008 ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) Tue Nov 4 16:53:47 2008 Enabling APIC mode: Flat. Using 5 I/O APICs Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Acked-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-05sched: re-tune balancingIngo Molnar1-3/+4
Impact: improve wakeup affinity on NUMA systems, tweak SMP systems Given the fixes+tweaks to the wakeup-buddy code, re-tweak the domain balancing defaults on NUMA and SMP systems. Turn on SD_WAKE_AFFINE which was off on x86 NUMA - there's no reason why we would not want to have wakeup affinity across nodes as well. (we already do this in the standard NUMA template.) lat_ctx on a NUMA box is particularly happy about this change: before: | phoenix:~/l> ./lat_ctx -s 0 2 | "size=0k ovr=2.60 | 2 5.70 after: | phoenix:~/l> ./lat_ctx -s 0 2 | "size=0k ovr=2.65 | 2 2.07 a 2.75x speedup. pipe-test is similarly happy about it too: | phoenix:~/sched-tests> ./pipe-test | 18.26 usecs/loop. | 14.70 usecs/loop. | 14.38 usecs/loop. | 10.55 usecs/loop. # +WAKE_AFFINE on domain0+domain1 | 8.63 usecs/loop. | 8.59 usecs/loop. | 9.03 usecs/loop. | 8.94 usecs/loop. | 8.96 usecs/loop. | 8.63 usecs/loop. Also: - disable SD_BALANCE_NEWIDLE on NUMA and SMP domains (keep it for siblings) - enable SD_WAKE_BALANCE on SMP domains Sysbench+postgresql improves all around the board, quite significantly: .28-rc3-11474e2c .28-rc3-11474e2c-tune ------------------------------------------------- 1: 571 688 +17.08% 2: 1236 1206 -2.55% 4: 2381 2642 +9.89% 8: 4958 5164 +3.99% 16: 9580 9574 -0.07% 32: 7128 8118 +12.20% 64: 7342 8266 +11.18% 128: 7342 8064 +8.95% 256: 7519 7884 +4.62% 512: 7350 7731 +4.93% ------------------------------------------------- SUM: 55412 59341 +6.62% So it's a win both for the runup portion, the peak area and the tail. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-05powerpc: Fix "unused variable" warning in pci_dlpar.cStephen Rothwell1-1/+0
This gets rid of this build warning: arch/powerpc/platforms/pseries/pci_dlpar.c: In function 'init_phb_dynamic': arch/powerpc/platforms/pseries/pci_dlpar.c:192: warning: unused variable 'b' This is one of the very few warnings left in a ppc64_defconfig build and getting rid of it will make it easier to see future introduced ones (in fact this was introduced very recently). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-05powerpc/cell: Fix compile error in ras.cAlexey Dobriyan1-0/+1
This fixes this error on Cell when CONFIG_KEXEC = n: arch/powerpc/platforms/cell/ras.c:299: error: implicit declaration of function 'crash_shutdown_register' We have to include <asm/kexec.h> because it contains the dummy definition of crash_shutdown_register that is used when CONFIG_KEXEC=n, but <linux/kexec.h> doesn't include <asm/kexec.h> in that case. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-04ARM: OMAP: Fix define for twl4030 irqsTony Lindgren1-1/+1
Otherwise twl4030 gpios won't work. Signed-off-by: Tony Lindgren <tony@atomide.com>
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