Thread (24 messages) 24 messages, 6 authors, 2024-08-02

Re: [PATCH v2] PCI: Fix crash during pci_dev hot-unplug on pseries KVM guest

From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2024-07-26 12:49:34
Also in: linux-devicetree, linux-pci, lkml

Amit Machhiwal [off-list ref] writes:
Hi Bjorn,

On 2024/07/25 03:55 PM, Bjorn Helgaas wrote:
quoted
On Thu, Jul 25, 2024 at 11:15:39PM +0530, Amit Machhiwal wrote:
quoted
...
The crash in question is a critical issue that we would want to have
a fix for soon. And while this is still being figured out, is it
okay to go with the fix I proposed in the V1 of this patch?
v6.10 has been released already, and it will be a couple months before
the v6.11 release.

It looks like the regression is 407d1a51921e, which appeared in v6.6,
almost a year ago, so it's fairly old.

What target are you thinking about for the V1 patch?  I guess if we
add it as a v6.11 post-merge window fix, it might get backported to
stable kernels before v6.11?  
Yes, I think we can go ahead with taking V1 patch for v6.11 post-merge window to
fix the current bug and ask Ubuntu to pick it while Lizhi's proposed patch goes
under test and review.
Lizhi's proposed patch (v3?) looks pretty small and straight forward.
It should be possible to get it tested and reviewed and merge it as a
fix during the v6.11-rc series.

Or if the CONFIG option is completely broken as Rob suggests then it
should just be forced off in Kconfig.

cheers
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