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Re: Weird message from xfs_repair

To: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Subject: Re: Weird message from xfs_repair
From: Ben Myers <bpm@xxxxxxx>
Date: Wed, 1 May 2013 14:43:20 -0500
Cc: "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20130501200633.5d24caf5@xxxxxxxxxxxxxx>
References: <20130501200633.5d24caf5@xxxxxxxxxxxxxx>
User-agent: Mutt/1.5.20 (2009-06-14)
Hi Emmanuel,

On Wed, May 01, 2013 at 08:06:33PM +0200, Emmanuel Florac wrote:
> I've just had to resort to the latest devel version of xfs_repair to
> get back some heavily damaged filesystem (thanks to a failing RAID
> controller), and it ended with the following message:
> cache_purge: shake on cache 0x672030 left 1 nodes!?
> What's this about? I didn't look at the source, but a new run of
> xfs_repair detected nothing. 

xfs_repair/libxfs has caches for xfs_bufs and inodes to speed things up.
cache_purge is trying to flush out all entries from one of those caches.  After
the purge one entry was left unexpectedly, maybe because someone leaked a
reference on it or something.  The message doesn't indicate an on-disk problem,
it's a problem in xfs_repair.


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