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Re: XFS hang during xfs_fsr run

from [Michael Weissenbacher] [Permanent Link][Original]
To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: XFS hang during xfs_fsr run
From: Michael Weissenbacher <mw@xxxxxxxxxxxx>
Date: Fri, 12 Mar 2010 11:36:09 +0100
Cc: Eric Sandeen <sandeen@xxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <20100312100019.GA13230@xxxxxxxxxxxxx>
References: <20100304134641.GA26871@xxxxxxxxxxxxx> <4B8FC1B7.3070505@xxxxxxxxxxxx> <20100304222611.GK14317@xxxxxxxxxxxxxxxx> <4B92C71C.5010003@xxxxxxxxxxxx> <20100308000601.GF28189@xxxxxxxxxxxxxxxx> <4B94EADD.2080108@xxxxxxxxxxxx> <4B953D3F.3090002@xxxxxxxxxxx> <4B975C5C.5090806@xxxxxxxxxxxx> <20100311233934.GB4732@dastard> <4B9A0D2F.30506@xxxxxxxxxxxx> <20100312100019.GA13230@xxxxxxxxxxxxx>
User-agent: Thunderbird 2.0.0.23 (X11/20090817) 
So what's interesting is that cyrus uses mmapp access to files, which
might be an indicator that we have problems with excluding fsr on mmaped
files.
From what i saw by experimenting xfs_fsr doesn't skip mmapped files (while imho it should). Another cyrus file it hung on recently was: 
/var/imap/user/x/xxxxxxxx.seen: Cyrus skiplist DB

I will be happy to test out any patches.

hth,
Michael
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