[arch-dev-public] kernels: NFS ACL trouble

Andreas Radke andyrtr at archlinux.org
Mon May 27 12:53:18 EDT 2013

Am Fri, 12 Apr 2013 20:30:54 +0200
schrieb Andreas Radke <andyrtr at archlinux.org>:

> New stable kernels have been released.
> I suggest to avoid all the NFS lost files and other trouble we've seen
> recently to revert the 4 NFS ACL related commits that went into 3.0.72
> and 3.8.6 when updating our LTS and current kernel. If all is still
> fine after the bump we should inform upstream about the trouble and
> should try to find a proper fix.
> -Andy

I've found the time to track this down a bit further. It's all not a
bug in the kernel or NFS it seems. It's more likely a gcc compiler
regression. All kernels built with gcc 4.8.0 can easily reproduce file
system corruption here. I've build a 3.0.80 kernel with gcc 4.7.3 and
it doesn't show this bug.

I'll bring this to the gcc bug tracker. Still no clue how to help them
tracking this down further.

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