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Dan Williams c50a898fd4 ioat2: fix performance regression ... Commit 0793448 "DMAENGINE: generic channel status v2" changed the interface for how dma channel progress is retrieved. It inadvertently exported an internal helper function ioat_tx_status() instead of ioat_dma_tx_status(). The latter polls the hardware to get the latest completion state, while the helper just evaluates the current state without touching hardware. The effect is that we end up waiting for completion timeouts or descriptor allocation errors before the completion state is updated. iperf (before fix): [SUM] 0.0-41.3 sec 364 MBytes 73.9 Mbits/sec iperf (after fix): [SUM] 0.0- 4.5 sec 499 MBytes 940 Mbits/sec This is a regression starting with 2.6.35. Cc: <stable@kernel.org> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Jesse Brandeburg <jesse.brandeburg@intel.com> Cc: Linus Walleij <linus.walleij@stericsson.com> Cc: Maciej Sosnowski <maciej.sosnowski@intel.com> Reported-by: Richard Scobie <richard@sauce.co.nz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>		15 years ago
..
Makefile	…
dca.c	…
dma.c	Merge branch 'ioat' into dmaengine	15 years ago
dma.h	ioat2: catch and recover from broken vtd configurations v6	15 years ago
dma_v2.c	ioat2: fix performance regression	15 years ago
dma_v2.h	ioat2,3: convert to producer/consumer locking	15 years ago
dma_v3.c	ioat2: catch and recover from broken vtd configurations v6	15 years ago
hw.h	…
pci.c	ioat: Remove duplicated devm_kzalloc() calls for ioatdma_device	15 years ago
registers.h	ioat3: interrupt coalescing	15 years ago