On Mon, 06 Jan 2014 17:00:35 +0100 hans@xxxxxxxxxxxxxx wrote: > > > Hi Neil, > > the output of 'uname -r' is: 3.2.0-4-amd64. A standard Debian Wheezy. > > I rebooted the system in the meantime. The re-sync started anew but > finished otherwise without flaws. I guess there must be some other bug then. I still expect that it is related to md_flush_request(). Probably related to the fact that you have an md device on top of other md devices.... I had a quick look and cannot find the cause of the problem. Maybe it will have to wait until someone else hit it :-( Thanks for the report, NeilBrown > > Regards, Hans > > Am 05.01.2014 23:00, schrieb NeilBrown: > > > On Sun, 22 Dec 2013 17:43:43 +0100 Hans Kraus <hans@xxxxxxxxxxxxxx> 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] [<ffffffff81070fc1>] ? arch_local_irq_save+0x11/0x17 [40800.777071] [<ffffffffa0170466>] ? md_flush_request+0x96/0x111 [md_mod] [40800.777076] [<ffffffff8103f6c4>] ? try_to_wake_up+0x197/0x197 [40800.777082] [<ffffffffa0f11711>] ? make_request+0x25/0x37a [raid456] [40800.777091] [<ffffffffa0185873>] ? > > 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 <neilb@xxxxxxx> > 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 > >
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