From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: More 'D' state processes [was: Re: Weird problem: mdadm blocks] Date: Mon, 6 Jan 2014 09:00:54 +1100 Message-ID: <20140106090054.594f6853@notabene.brown> References: <52B6AA66.5050502@hanswkraus.com> <20131222221914.78630829@notabene.brown> <52B70F38.5040807@hanswkraus.com> <52B716BF.70000@hanswkraus.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/FgQlfGICMoQDEE/S=yifaHR"; protocol="application/pgp-signature" Return-path: In-Reply-To: <52B716BF.70000@hanswkraus.com> Sender: linux-raid-owner@vger.kernel.org To: Hans Kraus Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/FgQlfGICMoQDEE/S=yifaHR Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Sun, 22 Dec 2013 17:43:43 +0100 Hans Kraus wrote: > Hi Neil, Hi Hans, sorry for the delay - Christmas/New Year vacation... > > [40800.777037] xfsaild/dm-0 D ffff88003754c300 0 20798 2 > > 0x00000000 > > [40800.777042] ffff88003754c300 0000000000000046 0000000000000000 > > ffff88005d7c51a0 > > [40800.777047] 0000000000013780 ffff88001b01ffd8 ffff88001b01ffd8 > > ffff88003754c300 > > [40800.777052] ffff880071fede00 ffffffff81070fc1 0000000000000046 > > ffff88003734a400 > > [40800.777057] Call Trace: > > [40800.777061] [] ? arch_local_irq_save+0x11/0x17 > > [40800.777071] [] ? md_flush_request+0x96/0x111 [md_= mod] > > [40800.777076] [] ? try_to_wake_up+0x197/0x197 > > [40800.777082] [] ? make_request+0x25/0x37a [raid456] > > [40800.777091] [] ? This looks like the most likely root of the problem - something wrong in md_flush_request. There was a bug here fixed in 2.6.37 commit a035fc3e2531703b539f23bec4ca7943cfc69349 Author: NeilBrown Date: Thu Dec 9 16:17:51 2010 +1100 md: fix possible deadlock in handling flush requests. You didn't say which kernel you were running. Could it be earlier than 2.6.37??? NeilBrown --Sig_/FgQlfGICMoQDEE/S=yifaHR Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIVAwUBUsnWFjnsnt1WYoG5AQI7/g/+P3zcZYEb/FVde/gCxc9VcFbxnoUkmx4u bR8GYyWalLraQp58DSisyhAqv3CiNMcTeoZQKX5Dtr/neUNy7rK0oC8lwk2uMepx jYRvjlhSkCXbctq9pKvmDbugCJIIvLuD5eMmlFmIQnDuXu0yr8KrI7faIoJkt/kk +ze1ailIyevJ2TgOws10Iyc+9+7wJPcnAo4/mlShcjDnDY9ReW9yW9JVyhc0/npx 2jJayEuYZlIIM5LO5fNkBGu8a9Tj0RSFLQ7rPT8VRDsZq15QJuZx6g7C4WdgiFK7 x3ADN2c2ic3y1npc3J/pGpsUN59MPBWvELHhdjhM1treZBqN26AOMiKulafpUY3u hfFDiYrU41x08y5VyswQS+ajWRcL2sKDdoQ+29wku2Ce8BJMLYQrOgp3l7ys9LFg kKrmlTmOBB3Lt5noc0LZ5Vd4OjpQwrnDwIVhJB/yuA1BMMJoVWw2k7uNuA4xz/cy Cl2B70ada9mtAko1RyKUnrJsBku4R50CqcY5/+sDrhosF8qSp8AM9dhSEMoIjSi7 wuA8JzGMzUF3L4LnS3o7TUr1gMmpYkpuSIJM6FpPdVRkQGDn291Wyoj9clXO6u8o obshiglatYrxA2CMjx+eEp8jzrofcRHf2OZYkAl9mi9lE08GkaFzwaHgGm3jKumJ DVBbX4v2kOg= =3/g9 -----END PGP SIGNATURE----- --Sig_/FgQlfGICMoQDEE/S=yifaHR--