From: Lukas Wunner <lukas@wunner.de>
To: "Ionut Nechita (Wind River)" <ionut.nechita@windriver.com>
Cc: linux-pci@vger.kernel.org, helgaas@kernel.org,
sebott@linux.ibm.com, schnelle@linux.ibm.com,
bblock@linux.ibm.com, alifm@linux.ibm.com, julianr@linux.ibm.com,
dtatulea@nvidia.com, mani@kernel.org, ionut_n2001@yahoo.com,
sunlightlinux@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 1/1] PCI/IOV: Add reentrant locking in sriov_add_vfs/sriov_del_vfs for complete serialization
Date: Tue, 3 Mar 2026 20:28:45 +0100 [thread overview]
Message-ID: <aac2bUCCX3dZcwo0@wunner.de> (raw)
In-Reply-To: <aacmM9bAPstfDpgY@wunner.de>
On Tue, Mar 03, 2026 at 07:19:31PM +0100, Lukas Wunner wrote:
> Also, I would put this in the existing pci_lock_rescan_remove(),
> i.e. without introducing a new _reentrant variant, because these
> deadlocks exist elsewhere. They're known to happen on unplug in
> pciehp as well.
Actually, scratch this particular comment. The deadlock in pciehp
is actually an AB-BA deadlock, not recursive acquisition.
next prev parent reply other threads:[~2026-03-03 19:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-03 8:09 [PATCH v5 0/1] PCI/IOV: Add reentrant locking in sriov_add_vfs/sriov_del_vfs Ionut Nechita (Wind River)
2026-03-03 8:09 ` [PATCH v5 1/1] PCI/IOV: Add reentrant locking in sriov_add_vfs/sriov_del_vfs for complete serialization Ionut Nechita (Wind River)
2026-03-03 18:19 ` Lukas Wunner
2026-03-03 19:28 ` Lukas Wunner [this message]
2026-03-03 19:56 ` Niklas Schnelle
2026-03-03 20:02 ` Keith Busch
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