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(parent: 074cc47) | patch
ioat3: disable cacheline-unaligned transfers for raid operations
authorDan Williams <dan.j.williams@intel.com>
Sat, 1 May 2010 22:22:56 +0000 (15:22 -0700)
committerDan Williams <dan.j.williams@intel.com>
Sat, 1 May 2010 22:22:56 +0000 (15:22 -0700)
commit2adfc550b6d9646301c810643bc309fa49375987
tree1e1fe80772dc588be2dc294d8b9f371caec3f0b0tree | snapshot
parent074cc47679f8b0931d7d5384e95822d82768f149commit | diff
ioat3: disable cacheline-unaligned transfers for raid operations

There are cases where cacheline-unaligned raid operations can hang the
dma channel.  Simply disable these operations by increasing the
alignment constraints published to async_tx.  The raid456 driver always
issues page aligned requests, so the only in-kernel user of the ioatdma
driver that is affected by this change is dmatest.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
drivers/dma/ioat/dma_v3.c diff | blob | history
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