From: Kay Sievers <kay.sievers@vrfy.org>
To: linux-hotplug@vger.kernel.org
Subject: Re: Hanging udev process on nfs-mounted /dev
Date: Tue, 05 Oct 2004 15:37:12 +0000 [thread overview]
Message-ID: <20041005153712.GA6450@vrfy.org> (raw)
In-Reply-To: <415980BF.1020401@bio.ifi.lmu.de>
On Mon, 2004-10-04 at 16:53 +0200, Frank Steiner wrote:
> Kay Sievers wrote
>
> > All here known failure paths are now covered in the attached patch by
> > limiting the iteration count for loops over data read from disk. Let's
> > see what happens next :)
>
> Ok :-) I'm running this patch in parallel on hosts using tmpfs for /dev
> as well as "old" ones still using NFS. I will report success or failures!
Nice, thanks for taking the time to investigate this. I hope we catch
all these failures now.
Here is the debug from the corrupt tdb-file you sent me. As expected,
the concurrent writing from multiple processes on a filesystem without
proper locking created an endless loop. Here is the debug with a loop
over three records:
696 -> 16384 -> 18200 ==> 696 -> 16384 -> 18200 ==> ...
[kay@pim ~]$ ./dumpit /home/kay/udev.tdb
hash\x11
rec: offseti6 next\x16384 rec_lenˆ4 key_len$ data_len…6 full_hash=0x13792fac magic=0x26011999
rec: offset\x16384 next\x18200 rec_lenˆ4 key_len$ data_len…6 full_hash=0x13792fac magic=0xd9fee666
rec: offset\x18200 nexti6 rec_lenˆ4 key_len$ data_len…6 full_hash=0xa713efac magic=0x26011999
rec: offseti6 next\x16384 rec_lenˆ4 key_len$ data_len…6 full_hash=0x13792fac magic=0x26011999
rec: offset\x16384 next\x18200 rec_lenˆ4 key_len$ data_len…6 full_hash=0x13792fac magic=0xd9fee666
rec: offset\x18200 nexti6 rec_lenˆ4 key_len$ data_len…6 full_hash=0xa713efac magic=0x26011999
rec: offseti6 next\x16384 rec_lenˆ4 key_len$ data_len…6 full_hash=0x13792fac magic=0x26011999
rec: offset\x16384 next\x18200 rec_lenˆ4 key_len$ data_len…6 full_hash=0x13792fac magic=0xd9fee666
rec: offset\x18200 nexti6 rec_lenˆ4 key_len$ data_len…6 full_hash=0xa713efac magic=0x26011999
rec: offseti6 next\x16384 rec_lenˆ4 key_len$ data_len…6 full_hash=0x13792fac magic=0x26011999
rec: offset\x16384 next\x18200 rec_lenˆ4 key_len$ data_len…6 full_hash=0x13792fac magic=0xd9fee666
rec: offset\x18200 nexti6 rec_lenˆ4 key_len$ data_len…6 full_hash=0xa713efac magic=0x26011999
rec: offseti6 next\x16384 rec_lenˆ4 key_len$ data_len…6 full_hash=0x13792fac magic=0x26011999
...
Thanks,
Kay
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next prev parent reply other threads:[~2004-10-05 15:37 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-28 15:18 Hanging udev process on nfs-mounted /dev Frank Steiner
2004-09-29 17:18 ` Greg KH
2004-09-29 23:39 ` Kay Sievers
2004-09-30 2:11 ` Kay Sievers
2004-09-30 6:18 ` Frank Steiner
2004-09-30 6:21 ` Frank Steiner
2004-09-30 14:07 ` Kay Sievers
2004-10-01 6:25 ` Frank Steiner
2004-10-01 7:36 ` Kay Sievers
2004-10-01 7:38 ` Frank Steiner
2004-10-01 7:55 ` Frank Steiner
2004-10-01 8:08 ` Kay Sievers
2004-10-01 9:43 ` Frank Steiner
2004-10-01 9:57 ` Kay Sievers
2004-10-01 10:43 ` Kay Sievers
2004-10-01 22:18 ` Kay Sievers
2004-10-03 21:10 ` Frank Steiner
2004-10-03 23:07 ` Kay Sievers
2004-10-04 6:15 ` Frank Steiner
2004-10-04 14:19 ` Kay Sievers
2004-10-04 14:53 ` Frank Steiner
2004-10-05 15:37 ` Kay Sievers [this message]
2004-10-06 6:06 ` Frank Steiner
2004-10-06 12:00 ` Kay Sievers
2004-10-06 12:29 ` Frank Steiner
2004-10-08 5:59 ` Frank Steiner
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