From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: Robin Murphy <robin.murphy@arm.com>,
will@kernel.org, joro@8bytes.org, bhelgaas@google.com,
rafael@kernel.org, lenb@kernel.org, praan@google.com,
kees@kernel.org, baolu.lu@linux.intel.com, smostafa@google.com,
Alexander.Grest@microsoft.com, kevin.tian@intel.com,
miko.lenczewski@arm.com, linux-arm-kernel@lists.infradead.org,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org,
vsethi@nvidia.com
Subject: Re: [PATCH v1 2/2] iommu/arm-smmu-v3: Recover ATC invalidate timeouts
Date: Fri, 6 Mar 2026 16:22:16 -0400 [thread overview]
Message-ID: <20260306202216.GO1651202@nvidia.com> (raw)
In-Reply-To: <aas2kHcjJPYFbKSD@Asurada-Nvidia>
On Fri, Mar 06, 2026 at 12:18:24PM -0800, Nicolin Chen wrote:
> IIUIC, we would have two timeouts to identify the device(s), so we
> wouldn't need to give away the optimization of batching ATCI cmds?
Yes we should not harm success path performance to compensate for a
RAS error case.
> Will letting a faulty device time out once again give it a window
> to corrupt the memory?
No, you are doing this within the flush callback so everything relying
on that flush should remain held.
Jason
next prev parent reply other threads:[~2026-03-06 20:22 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-05 5:21 [PATCH v1 0/2] iommu/arm-smmu-v3: Reset PCI device upon ATC invalidate timeout Nicolin Chen
2026-03-05 5:21 ` [PATCH v1 1/2] iommu: Do not call pci_dev_reset_iommu_done() unless reset succeeds Nicolin Chen
2026-03-05 5:21 ` [PATCH v1 2/2] iommu/arm-smmu-v3: Recover ATC invalidate timeouts Nicolin Chen
2026-03-05 15:15 ` kernel test robot
2026-03-05 15:24 ` Robin Murphy
2026-03-05 21:06 ` Nicolin Chen
2026-03-05 23:30 ` Nicolin Chen
2026-03-05 23:52 ` Jason Gunthorpe
2026-03-06 15:24 ` Robin Murphy
2026-03-06 15:56 ` Jason Gunthorpe
2026-03-10 19:34 ` Pranjal Shrivastava
2026-03-05 15:39 ` Jason Gunthorpe
2026-03-05 21:15 ` Nicolin Chen
2026-03-05 23:41 ` Jason Gunthorpe
2026-03-06 1:29 ` Nicolin Chen
2026-03-06 1:33 ` Jason Gunthorpe
2026-03-06 5:06 ` Nicolin Chen
2026-03-06 13:02 ` Jason Gunthorpe
2026-03-06 19:20 ` Nicolin Chen
2026-03-06 19:22 ` Jason Gunthorpe
2026-03-06 19:39 ` Nicolin Chen
2026-03-06 19:47 ` Jason Gunthorpe
2026-03-10 19:40 ` Pranjal Shrivastava
2026-03-10 19:57 ` Nicolin Chen
2026-03-10 20:04 ` Pranjal Shrivastava
2026-03-06 13:22 ` Robin Murphy
2026-03-06 14:01 ` Jason Gunthorpe
2026-03-06 20:18 ` Nicolin Chen
2026-03-06 20:22 ` Jason Gunthorpe [this message]
2026-03-06 20:34 ` Nicolin Chen
2026-03-06 3:22 ` Baolu Lu
2026-03-06 13:00 ` Jason Gunthorpe
2026-03-06 19:35 ` Samiullah Khawaja
2026-03-06 19:43 ` Jason Gunthorpe
2026-03-06 19:59 ` Samiullah Khawaja
2026-03-06 20:03 ` Jason Gunthorpe
2026-03-06 20:22 ` Samiullah Khawaja
2026-03-06 20:26 ` Jason Gunthorpe
2026-03-10 20:00 ` Samiullah Khawaja
2026-03-11 12:12 ` Jason Gunthorpe
2026-03-06 2:35 ` kernel test robot
2026-03-10 19:16 ` Pranjal Shrivastava
2026-03-10 19:51 ` Nicolin Chen
2026-03-10 20:00 ` Pranjal Shrivastava
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