From: sashiko-bot@kernel.org
To: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, "David Matlack" <dmatlack@google.com>
Cc: "Adithya Jayachandran" <ajayachandra@nvidia.com>,
"Pratyush Yadav" <pratyush@kernel.org>,
"Randy Dunlap" <rdunlap@infradead.org>,
kexec@lists.infradead.org, "Alex Williamson" <alex@shazbot.org>,
"Saeed Mahameed" <saeedm@nvidia.com>,
"Samiullah Khawaja" <skhawaja@google.com>,
"Shuah Khan" <skhan@linuxfoundation.org>,
"Yi Liu" <yi.l.liu@intel.com>, "Jason Gunthorpe" <jgg@nvidia.com>,
"Alexander Graf" <graf@amazon.com>,
"David Rientjes" <rientjes@google.com>,
"Chris Li" <chrisl@kernel.org>,
"Pranjal Shrivastava" <praan@google.com>,
"William Tu" <witu@nvidia.com>,
"Vipin Sharma" <vipinsh@google.com>,
"Jacob Pan" <jacob.pan@linux.microsoft.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Josh Hilke" <jrhilke@google.com>,
"Mike Rapoport" <rppt@kernel.org>,
"Parav Pandit" <parav@nvidia.com>,
linux-pci@vger.kernel.org,
"Pasha Tatashin" <pasha.tatashin@soleen.com>,
"Lukas Wunner" <lukas@wunner.de>,
"Leon Romanovsky" <leonro@nvidia.com>
Subject: Re: [PATCH v9 05/13] PCI: liveupdate: Auto-preserve upstream bridges across Live Update
Date: Fri, 18 Sep 2026 20:14:24 +0000 [thread overview]
Message-ID: <20260918201424.82EBD1F00898@smtp.kernel.org> (raw)
In-Reply-To: <20260918200640.887030-6-dmatlack@google.com>
> When a PCI device is preserved across a Live Update, all of its upstream
> bridges up to the root port must also be preserved. This enables the PCI
> core and any drivers bound to the bridges to manage bridges correctly
> across a Live Update.
>
> Notably, this will be used in subsequent commits to ensure that
> preserved devices can continue performing memory transactions without a
> disruption or change in routing.
>
> To preserve bridges, the PCI core tracks the number of downstream
> devices preserved under each bridge using a reference count in struct
> pci_dev_ser. This allows a bridge to remain preserved until all its
> downstream preserved devices are unpreserved or finish their
> participation in the Live Update.
>
> Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
> Reviewed-by: Pranjal Shrivastava <praan@google.com>
> Signed-off-by: David Matlack <dmatlack@google.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260918200640.887030-1-dmatlack@google.com?part=5
next prev parent reply other threads:[~2026-09-18 20:14 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-18 20:06 [PATCH v9 00/13] PCI: liveupdate: PCI core support for Live Update David Matlack
2026-09-18 20:06 ` [PATCH v9 01/13] PCI: liveupdate: Set up FLB handler for the PCI core David Matlack
2026-09-18 20:15 ` sashiko-bot
2026-09-25 19:55 ` Bjorn Helgaas
2026-10-10 8:43 ` Mike Rapoport
2026-09-18 20:06 ` [PATCH v9 02/13] PCI: liveupdate: Track outgoing preserved PCI devices David Matlack
2026-09-18 20:23 ` sashiko-bot
2026-09-18 20:06 ` [PATCH v9 03/13] PCI: liveupdate: Track incoming " David Matlack
2026-09-18 20:20 ` sashiko-bot
2026-09-25 19:59 ` Bjorn Helgaas
2026-10-10 8:47 ` Mike Rapoport
2026-09-18 20:06 ` [PATCH v9 04/13] PCI: liveupdate: Document driver binding responsibilities David Matlack
2026-09-18 20:09 ` sashiko-bot
2026-09-18 20:06 ` [PATCH v9 05/13] PCI: liveupdate: Auto-preserve upstream bridges across Live Update David Matlack
2026-09-18 20:14 ` sashiko-bot [this message]
2026-09-25 20:02 ` Bjorn Helgaas
2026-09-18 20:06 ` [PATCH v9 06/13] PCI: liveupdate: Preserve bus numbers during " David Matlack
2026-09-18 20:13 ` sashiko-bot
2026-09-25 20:04 ` Bjorn Helgaas
2026-09-28 17:16 ` Pranjal Shrivastava
2026-09-18 20:06 ` [PATCH v9 07/13] PCI: Refactor matching logic for pci_dev_acs_ops David Matlack
2026-09-18 20:13 ` sashiko-bot
2026-09-18 20:06 ` [PATCH v9 08/13] PCI: Save and restore the ACS Control register David Matlack
2026-09-18 20:15 ` sashiko-bot
2026-09-19 1:18 ` Alex Williamson
2026-09-21 20:36 ` David Matlack
2026-10-07 9:20 ` David Matlack
2026-10-08 19:44 ` Alex Williamson
2026-09-28 17:18 ` Pranjal Shrivastava
2026-09-18 20:06 ` [PATCH v9 09/13] PCI: liveupdate: Adopt ACS controls in incoming preserved devices David Matlack
2026-09-18 20:13 ` sashiko-bot
2026-09-28 17:19 ` Pranjal Shrivastava
2026-09-18 20:06 ` [PATCH v9 10/13] PCI: liveupdate: Adopt ARI Forwarding Enable on preserved bridges David Matlack
2026-09-18 20:19 ` sashiko-bot
2026-09-18 20:06 ` [PATCH v9 11/13] PCI: liveupdate: Freeze preservation status during shutdown David Matlack
2026-09-18 20:19 ` sashiko-bot
2026-09-18 20:06 ` [PATCH v9 12/13] PCI: liveupdate: Do not disable bus mastering on preserved devices during kexec David Matlack
2026-09-18 20:17 ` sashiko-bot
2026-09-18 20:06 ` [PATCH v9 13/13] Documentation: PCI: Add documentation for Live Update David Matlack
2026-09-18 20:14 ` sashiko-bot
2026-09-22 18:36 ` [PATCH v9 00/13] PCI: liveupdate: PCI core support " Zhu Yanjun
2026-09-22 18:53 ` David Matlack
2026-09-23 23:27 ` Zhu Yanjun
2026-09-24 21:59 ` David Matlack
2026-09-25 4:47 ` Zhu Yanjun
2026-09-25 18:59 ` Samiullah Khawaja
2026-09-22 18:54 ` Zhu Yanjun
2026-09-22 21:47 ` Zhu Yanjun
2026-09-28 15:46 ` Pasha Tatashin
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