From: Subject: [PATCH v5 0/6] Raid: enable talitos xor offload for improving performance Date: Wed, 1 Aug 2012 16:46:00 +0800 Message-ID: <1343810760-8035-1-git-send-email-qiang.liu@freescale.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , To: , , , , , , Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org Hi, 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 spin_lock_irqsave. 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(-)