Re: linux-5.15.69 breaks nfs client #forregzbot

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TWIMC: this mail is primarily send for documentation purposes and for
regzbot, my Linux kernel regression tracking bot. These mails usually
contain '#forregzbot' in the subject, to make them easy to spot and filter.

On 23.09.22 09:46, Thorsten Leemhuis wrote:
> Hi, this is your Linux kernel regression tracker. CCing the regression
> mailing list, as it should be in the loop for all regressions, as
> explained here:
> https://www.kernel.org/doc/html/latest/admin-guide/reporting-issues.html
> Also CCing the stable ml, the NFS maintainers, and the authors of
> 31b992b3c39b, too.
> 
> On 22.09.22 23:46, Kurt Garloff wrote:
>>
>> a freshly compiled 5.15.69 kernel showed hangs with NFS.
>> Typically mkdir would end up in a 'D' process state, but I
>> have seen ls -l hanging as well.
>> Server is kernel NFS 5.15.69.
>>
>> After reverting the last three NFS related commits,
>> a68a734b19af NFS: Fix WARN_ON due to unionization of nfs_inode.nrequests
>> 3b97deb4abf5 NFS: Fix another fsync() issue after a server reboot
>> 31b992b3c39b NFS: Save some space in the inode
>>
>> things work normally again.
>>
>> As you can see, I suspected 31b992b3c39b ...
> 
> FWIW, that's e591b298d7ec in mainline.
> 
>> I know this report is light on details; if nothing like this has been
>> reported yet, let me know and I'll try to find some time to investigate
>> further.
>>
>> PS: Please keep me on Cc, I'm not subscribed to linux-nfs.
> 
> [...]
> 
> #regzbot ^introduced 31b992b3c39b
> #regzbot ignore-activity

#regzbot fixed-by: 27bf7a5d11987



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