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authorLinus Torvalds <torvalds@linux-foundation.org>2014-10-07 20:39:25 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-07 20:39:25 -0400
commitd0cd84817c745655428dbfdb1e3f754230b46bef (patch)
treea7b6f422f6ac50f506ffa7a66f8e83387f90f212 /Documentation
parentbdf428feb225229b1d4715b45bbdad4a934cd89c (diff)
parent3f334078567245429540e6461c81c749fce87f70 (diff)
downloadlinux-d0cd84817c745655428dbfdb1e3f754230b46bef.tar.bz2
Merge tag 'dmaengine-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine
Pull dmaengine updates from Dan Williams: "Even though this has fixes marked for -stable, given the size and the needed conflict resolutions this is 3.18-rc1/merge-window material. These patches have been languishing in my tree for a long while. The fact that I do not have the time to do proper/prompt maintenance of this tree is a primary factor in the decision to step down as dmaengine maintainer. That and the fact that the bulk of drivers/dma/ activity is going through Vinod these days. The net_dma removal has not been in -next. It has developed simple conflicts against mainline and net-next (for-3.18). Continuing thanks to Vinod for staying on top of drivers/dma/. Summary: 1/ Step down as dmaengine maintainer see commit 08223d80df38 "dmaengine maintainer update" 2/ Removal of net_dma, as it has been marked 'broken' since 3.13 (commit 77873803363c "net_dma: mark broken"), without reports of performance regression. 3/ Miscellaneous fixes" * tag 'dmaengine-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine: net: make tcp_cleanup_rbuf private net_dma: revert 'copied_early' net_dma: simple removal dmaengine maintainer update dmatest: prevent memory leakage on error path in thread ioat: Use time_before_jiffies() dmaengine: fix xor sources continuation dma: mv_xor: Rename __mv_xor_slot_cleanup() to mv_xor_slot_cleanup() dma: mv_xor: Remove all callers of mv_xor_slot_cleanup() dma: mv_xor: Remove unneeded mv_xor_clean_completed_slots() call ioat: Use pci_enable_msix_exact() instead of pci_enable_msix() drivers: dma: Include appropriate header file in dca.c drivers: dma: Mark functions as static in dma_v3.c dma: mv_xor: Add DMA API error checks ioat/dca: Use dev_is_pci() to check whether it is pci device
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/removed/net_dma8
-rw-r--r--Documentation/networking/ip-sysctl.txt6
2 files changed, 8 insertions, 6 deletions
diff --git a/Documentation/ABI/removed/net_dma b/Documentation/ABI/removed/net_dma
new file mode 100644
index 000000000000..a173aecc2f18
--- /dev/null
+++ b/Documentation/ABI/removed/net_dma
@@ -0,0 +1,8 @@
+What: tcp_dma_copybreak sysctl
+Date: Removed in kernel v3.13
+Contact: Dan Williams <dan.j.williams@intel.com>
+Description:
+ Formerly the lower limit, in bytes, of the size of socket reads
+ that will be offloaded to a DMA copy engine. Removed due to
+ coherency issues of the cpu potentially touching the buffers
+ while dma is in flight.
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 29a93518bf18..caedb18d4564 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -580,12 +580,6 @@ tcp_workaround_signed_windows - BOOLEAN
not receive a window scaling option from them.
Default: 0
-tcp_dma_copybreak - INTEGER
- Lower limit, in bytes, of the size of socket reads that will be
- offloaded to a DMA copy engine, if one is present in the system
- and CONFIG_NET_DMA is enabled.
- Default: 4096
-
tcp_thin_linear_timeouts - BOOLEAN
Enable dynamic triggering of linear timeouts for thin streams.
If set, a check is performed upon retransmission by timeout to