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SubjectRe: 2.6.34rc4 NFS writeback regression (bisected): client often fails to delete things it just created
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On Sun, 2010-04-18 at 20:27 +0100, Nix wrote: 
> On 18 Apr 2010, Trond Myklebust verbalised:
>
> > On Sat, 2010-04-17 at 20:43 +0100, Nix wrote:
> >> I suspect that unlink()ing a not otherwise open file for which writeback
> >> is still underway is causing the files to be sillyrenamed because
> >> writeback is holding them open. If writeback is the only user, they
> >> should surely not be held open: nobody cares what their contents are,
> >> and a lot of code depends on rm -r of directories containing recently-
> >> written-but-still-closed files succeeding.
> >
> > Did you test with commit b80c3cb628f0ebc241b02e38dd028969fb8026a2 (NFS:
> > Ensure that writeback_single_inode() calls write_inode() when syncing)?
> > That fixed the above problem on my setup.
>
> tip-of-tree includes that commit, and it's still happening for me there.
> (Just verified again.)

Does a 'sync' clear out the sillyrenamed files?

> (The exported filesystem is coming from a box running 2.6.33 atop ext4,
> in case it matters.)

That shouldn't matter.


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