2012-08-01 08:46:00

by Qiang Liu

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Subject: [PATCH v5 0/6] Raid: enable talitos xor offload for improving performance


The following 6 patches enabling fsl-dma and talitos offload raid
operations for improving raid performance and balancing CPU load.

Write performance will be improved by 25-30% tested by iozone.
Write performance is improved about 2% after using spin_lock_bh replace
CPU load will be reduced by 8%.

Changes in v5:
- add detail description in patch 3/6 about the process of completed
descriptor, the process is in align with fsl-dma Reference Manual,
illustrate the potential risk and how to reproduce it;
- drop the patch 7/7 in v4 according to Timur's comments;

Changes in v4:
- fix an error in talitos when dest addr is same with src addr, dest
should be freed only one time if src is same with dest addr;
- correct coding style in fsl-dma according to Ira's comments;
- fix a race condition in fsl-dma fsl_tx_status(), remove the interface
which is used to free descriptors in queue ld_completed, this interface
has been included in fsldma_cleanup_descriptor(), in v3, there is one
place missed spin_lock protect;
- split the original patch 3/4 up to 2 patches 3/7 and 4/7 according to
Li Yang's comments;
- fix a warning of unitialized cookie;
- add memory copy self test in fsl-dma;
- add more detail description about use spin_lock_bh() to instead of
spin_lock_irqsave() according to Timur's comments.

Changes in v3:
- change release process of fsl-dma descriptor for resolve the
potential race condition;
- add test result when use spin_lock_bh replace spin_lock_irqsave;
- modify the benchmark results according to the latest patch.

Changes in v2:
- rebase onto cryptodev tree;
- split the patch 3/4 up to 3 independent patches;
- remove the patch 4/4, the fix is not for cryptodev tree;

Qiang Liu (6):
Talitos: Support for async_tx XOR offload
fsl-dma: remove attribute DMA_INTERRUPT of dmaengine
fsl-dma: change release process of dma descriptor for supporting async_tx
fsl-dma: move the function ahead of its invoke function
fsl-dma: use spin_lock_bh to instead of spin_lock_irqsave
fsl-dma: fix a warning of unitialized cookie

drivers/crypto/Kconfig | 9 +
drivers/crypto/talitos.c | 413 ++++++++++++++++++++++++++++++++++++++++
drivers/crypto/talitos.h | 53 ++++++
drivers/dma/fsldma.c | 467 ++++++++++++++++++++++++++--------------------
drivers/dma/fsldma.h | 1 +
5 files changed, 739 insertions(+), 204 deletions(-)