linux-kernel - [PATCH 0/7] iommu/amd: Optimize iova queue flushing

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Date:   Wed,  7 Jun 2017 16:58:13 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     iommu@...ts.linux-foundation.org
Cc:     linux-kernel@...r.kernel.org,
        Tom Lendacky <thomas.lendacky@....com>,
        Arindam Nath <arindam.nath@....com>,
        Joerg Roedel <joro@...tes.org>
Subject: [PATCH 0/7] iommu/amd: Optimize iova queue flushing

Hi,

here is a patch-set to optimize the queue flushing in the
AMD IOMMU driver. It removes the global per-cpu flush queues
and implements queue-rings which are per-domain and per-cpu.

This allows some good optimizations to lower the flush-rate
of a domain and also lowers the contention on the queue
locks.

Regards,

	Joerg

Joerg Roedel (7):
  iommu/amd: Rip out old queue flushing code
  iommu/amd: Add per-domain flush-queue data structures
  iommu/amd: Make use of the per-domain flush queue
  iommu/amd: Add locking to per-domain flush-queue
  iommu/amd: Add flush counters to struct dma_ops_domain
  iommu/amd: Add per-domain timer to flush per-cpu queues
  iommu/amd: Remove queue_release() function

 drivers/iommu/amd_iommu.c | 363 +++++++++++++++++++++++++++++-----------------
 1 file changed, 227 insertions(+), 136 deletions(-)

-- 
2.7.4