Thread (16 messages) 16 messages, 6 authors, 2012-10-04

Re: [REGRESSION] nfsd crashing with 3.6.0-rc7 on PowerPC

From: Alexander Graf <hidden>
Date: 2012-09-28 15:35:07
Also in: linux-nfs, lkml

On 28.09.2012, at 17:10, J. Bruce Fields wrote:
On Fri, Sep 28, 2012 at 04:19:55AM +0200, Alexander Graf wrote:
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On 28.09.2012, at 04:04, Linus Torvalds wrote:
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On Thu, Sep 27, 2012 at 6:55 PM, Alexander Graf [off-list ref] =
wrote:
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Below are OOPS excerpts from different rc's I tried. All of them =
crashed - all the way up to current Linus' master branch. I haven't =
cross-checked, but I don't remember any such behavior from pre-3.6 =
releases.
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Since you seem to be able to reproduce it easily (and apparently
reliably), any chance you could just bisect it?
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Since I assume v3.5 is fine, and apparently -rc1 is already busted, =
a simple
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 git bisect start
 git bisect good v3.5
 git bisect bad v3.6-rc1
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will get you started on your adventure..
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Heh, will give it a try :). The thing really does look quite =
bisectable.
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It might take a few hours though - the machine isn't exactly fast by =
today's standards and it's getting late here. But I'll keep you updated.
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I doubt it's anything special about that workload, but just for kicks =
I
tried a "git clone -ls" (cloning my linux tree to another directory on
the same nfs filesystem), with server on 3.6.0-rc7, and didn't see
anything interesting (just an xfs lockdep warning that looks like this
one jlayton already reported:
http://oss.sgi.com/archives/xfs/2012-09/msg00088.html
)
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Any (even partial) bisection results would certainly be useful, =
thanks.

Yeah, still trying. Running the same workload in a PPC VM didn't show =
any badness. Then I tried again to bisect on the machine it broken on, =
and that commit failed even more badly on me than the previous ones, =
destroying my local git tree.

Trying to narrow down now in a slightly more contained environment :).


Alex
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