From: sashiko-bot@kernel.org
To: "Shameer Kolothum" <skolothumtho@nvidia.com>, linux-pci@vger.kernel.org
Subject: Re: [RFC PATCH v3 12/20] vfio/pci: Use access ops for DMA-BUF export and restoration
Date: Thu, 12 Nov 2026 14:29:51 +0000 [thread overview]
Message-ID: <sashiko-outbox-211322@kernel.org> (raw)
In-Reply-To: <20261112141632.918954-13-skolothumtho@nvidia.com>
> DMA-BUF export can race with recovery revoking device mappings.
>
> Keep the range lookup, export and list insertion inside SRCU so recovery
> waits for admitted exports before revoking mappings. Keep userspace
> copies and file descriptor installation outside SRCU.
>
> Select ordinary mapping restoration through access ops under
> memory_lock. Skip restoration while access is blocked. Provide an
> internal helper so recovery can restore mappings before allowing access
> again. Revocation remains available while access is blocked.
>
> Signed-off-by: Shameer Kolothum <skolothumtho@nvidia.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261112141632.918954-1-skolothumtho@nvidia.com?part=12
next prev parent reply other threads:[~2026-11-12 14:29 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-12 14:16 [RFC PATCH v3 00/20] vfio/pci: Handle PCI error recovery and report state to userspace Shameer Kolothum
2026-11-12 14:16 ` [RFC PATCH v3 01/20] vfio/pci: Add SRCU-protected access ops Shameer Kolothum
2026-11-12 14:29 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 02/20] PCI/PM: Add a power-state helper that tries the bus lock Shameer Kolothum
2026-11-12 14:30 ` sashiko-bot
2026-11-12 21:16 ` Bjorn Helgaas
2026-11-12 14:16 ` [RFC PATCH v3 03/20] vfio/pci: Avoid waiting for the bus lock when preparing D0 Shameer Kolothum
2026-11-12 14:33 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 04/20] vfio/pci: Use access ops for config-space accesses Shameer Kolothum
2026-11-12 14:41 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 05/20] vfio/pci: Buffer ROM reads before copying to userspace Shameer Kolothum
2026-11-12 14:40 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 06/20] vfio/pci: Use access ops for BAR and ROM accesses Shameer Kolothum
2026-11-12 14:34 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 07/20] vfio/pci: Use access ops when mapping BAR pages Shameer Kolothum
2026-11-12 14:28 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 08/20] vfio/pci: Use access ops for hardware IRQ operations Shameer Kolothum
2026-11-12 14:30 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 09/20] vfio/pci: Use access ops for function reset Shameer Kolothum
2026-11-12 14:32 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 10/20] vfio/pci: Use access ops for runtime-PM requests Shameer Kolothum
2026-11-12 14:33 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 11/20] vfio/pci: Use access ops for hardware information queries Shameer Kolothum
2026-11-12 14:47 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 12/20] vfio/pci: Use access ops for DMA-BUF export and restoration Shameer Kolothum
2026-11-12 14:29 ` sashiko-bot [this message]
2026-11-12 14:16 ` [RFC PATCH v3 13/20] vfio/pci: Track PCI recovery state Shameer Kolothum
2026-11-12 14:35 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 14/20] vfio/pci: Add INTx recovery operations Shameer Kolothum
2026-11-12 14:52 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 15/20] vfio/pci: Use access ops for SR-IOV configuration and shared reset Shameer Kolothum
2026-11-12 14:49 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 16/20] vfio/pci: Restore device state from slot_reset() Shameer Kolothum
2026-11-12 14:50 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 17/20] vfio/pci: Complete recovery in resume() Shameer Kolothum
2026-11-12 14:45 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 18/20] vfio/pci: Block device access during host recovery Shameer Kolothum
2026-11-12 15:06 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 19/20] vfio/pci: Add VFIO_DEVICE_FEATURE_PCI_ERROR_RECOVERY Shameer Kolothum
2026-11-12 14:43 ` sashiko-bot
2026-11-12 14:16 ` [RFC PATCH v3 20/20] vfio/pci: Enable recovery for supported native PCIe endpoints Shameer Kolothum
2026-11-12 15:10 ` sashiko-bot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=sashiko-outbox-211322@kernel.org \
--to=sashiko-bot@kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=sashiko-reviews@lists.linux.dev \
--cc=skolothumtho@nvidia.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.