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From: Jacob Pan <jacob.pan@linux.microsoft.com>
To: linux-kernel@vger.kernel.org,
	"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
	Will Deacon <will@kernel.org>, Joerg Roedel <joro@8bytes.org>,
	Mostafa Saleh <smostafa@google.com>,
	Jason Gunthorpe <jgg@nvidia.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Nicolin Chen <nicolinc@nvidia.com>
Cc: Jacob Pan <jacob.pan@linux.microsoft.com>,
	Zhang Yu <zhangyu1@linux.microsoft.com>,
	Jean Philippe-Brucker <jean-philippe@linaro.org>,
	Alexander Grest <Alexander.Grest@microsoft.com>
Subject: [PATCH v2 0/2] SMMU v3 CMDQ fix and improvement
Date: Mon, 20 Oct 2025 15:43:51 -0700	[thread overview]
Message-ID: <20251020224353.1408-1-jacob.pan@linux.microsoft.com> (raw)

Hi Will et al,

These two patches are derived from testing SMMU driver with smaller CMDQ
sizes where we see soft lockups.

This happens on HyperV emulated SMMU v3 as well as baremetal ARM servers
with artificially reduced queue size and microbenchmark to stress test
concurrency.

Thanks,

Jacob 

Alexander Grest (1):
  iommu/arm-smmu-v3: Improve CMDQ lock fairness and efficiency

Jacob Pan (1):
  iommu/arm-smmu-v3: Fix CMDQ timeout warning

 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 97 ++++++++++-----------
 1 file changed, 47 insertions(+), 50 deletions(-)

-- 
2.43.0


             reply	other threads:[~2025-10-20 22:43 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-20 22:43 Jacob Pan [this message]
2025-10-20 22:43 ` [PATCH v2 1/2] iommu/arm-smmu-v3: Fix CMDQ timeout warning Jacob Pan
2025-10-30 22:41   ` Nicolin Chen
2025-11-03 23:16     ` Jacob Pan
2025-11-04  1:23       ` Nicolin Chen
2025-11-04 18:25         ` Jacob Pan
2025-11-04 18:48           ` Nicolin Chen
2025-11-04 19:37             ` Jacob Pan
2025-10-20 22:43 ` [PATCH v2 2/2] iommu/arm-smmu-v3: Improve CMDQ lock fairness and efficiency Jacob Pan
2025-10-31  2:00   ` Nicolin Chen
2025-11-04  1:08     ` Jacob Pan
2025-10-30 15:42 ` [PATCH v2 0/2] SMMU v3 CMDQ fix and improvement Jacob Pan

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