From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hugo Mills Subject: Re: ENOSPC at 94% full -- and causing BUGs elsewhere? Date: Mon, 12 Oct 2009 15:09:35 +0100 Message-ID: <20091012140935.GA8550@vlad.carfax.org.uk> References: <20091003122109.GB3116@selene> <20091003215531.GG4350@dhcp231-156.rdu.redhat.com> <20091004120630.GA19916@think> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="ZGiS0Q5IWpPtfppv" To: Chris Mason , Josef Bacik , Hugo Mills , linux-btrfs@vger.kernel.org Return-path: In-Reply-To: <20091004120630.GA19916@think> List-ID: --ZGiS0Q5IWpPtfppv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sun, Oct 04, 2009 at 08:06:30AM -0400, Chris Mason wrote: > On Sat, Oct 03, 2009 at 05:55:32PM -0400, Josef Bacik wrote: > > On Sat, Oct 03, 2009 at 01:21:09PM +0100, Hugo Mills wrote: > > > I've just had the following on my home server. I believe that it's > > > btrfs that's responsible, as the machine wasn't doing much other than > > > reading/writing on a btrfs filesystem. The process that was doing so > > > is now stuck in D+ state, and can't be killed. The timing of the oops > > > at the end is also suggestive of being involved in the same incident. > > > This is the only btrfs filesystem on the machine. > > > > Patches have gone to Linus to fix the enospc problems. You can try running the > > enospc branch of Chris's git tree and it should behave better for you. Thanks, > > The right tree for this is the master branch of btrfs-unstable for > 2.6.31. Thanks, Josef and Chris. I've now found the time to check out and build the btrfs-unstable tree, and it is indeed handling the ENOSPC condition much more cleanly. However, it seems to have got into a position where I have lots of free space reported by df (over 10% of the size of the volume -- 185 GiB free of 1474 GiB total), but still refuses to write anything to the filesystem. Do you have any suggestions for what I could try? The original ENOSPC error I reported above happened at approximately 85/1370 GiB free; I then added 100 GiB more space online, had another failure (same kernel: 2.6.31 mainline), and then rebooted into master from btrfs-unstable. Just for the record, I'm now using this kernel: Linux vlad 2.6.31-47417-gac6889c #1 Sun Oct 11 14:27:06 BST 2009 x86_64 GNU/Linux Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- I'll take your bet, but make it ten thousand francs. I'm only --- a _poor_ corrupt official. --ZGiS0Q5IWpPtfppv Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iD4DBQFK0zifIKyzvlFcI40RAg+nAJdRzXpw/qsL9IttaUj1kqicvj1cAKChuxwm 5BI42Ad/7hXQR+YY2q+w1w== =/ts2 -----END PGP SIGNATURE----- --ZGiS0Q5IWpPtfppv--