ACK: [PATCH 0/1][SRU][jammy:linux-azure] Azure: Jammy fio test causes panic

Cory Todd cory.todd at canonical.com
Wed Nov 16 20:10:14 UTC 2022


On Wed, Nov 16, 2022 at 01:01:55PM -0700, Tim Gardner wrote:
> BugLink: https://bugs.launchpad.net/bugs/1996806
> 
> SRU Justification
> 
> [Impact]
> 
> During Storage performance tests, 16 disks are attached and fio is ran. The fio
> command does not consistently result in a kernel panic, but the test runs fio
> enough times to result in consistent kernel panic. The panic is most often
> observed on instances with many cores and disks.
> 
> This panic fix qualifies for a respin.
> 
> [Test Case]
> 
> Using an instance with 96 cores and 16 disks:
> 
> sudo fio --ioengine=libaio --bs=1024K --filename=/dev/sda:/dev/sdb:/dev/sdc:/dev/sdd:/dev/sde:/dev/sdf:/dev/sdg:/dev/sdh:/dev/sdi:/dev/sdj:/dev/sdk:/dev/sdl:/dev/sdm:/dev/sdn:/dev/sdo:/dev/sdp --readwrite=read --runtime=120 --iodepth=32 --numjob=96 --name=iteration23 --direct=1 --size=8192M --group_reporting --overwrite=1
> 
> [Regression Potential]
> 
> The fix is an upstream patch from 5.17, commit 0bd2fbee9d0b7f801a9c0264d90b1e0d8053f395 ('scsi:
> storvsc: Fix unsigned comparison to zero'). Regression potential is low.
> 
> [Other Info]
> 
> SF: #00346757
> 
Acked-by: Cory Todd <cory.todd at canonical.com>
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