From: Chris J Arges <chris.j.arges@canonical.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: Re: Still seeing hangs in xlog_grant_log_space
Date: Tue, 12 Jun 2012 08:28:38 -0500 [thread overview]
Message-ID: <4FD74406.7000602@canonical.com> (raw)
In-Reply-To: <20120611235337.GE22848@dastard>
On 06/11/2012 06:53 PM, Dave Chinner wrote:
> On Mon, Jun 11, 2012 at 01:42:31PM -0700, Chris J Arges wrote:
>> Mark Tinguely-3 wrote:
>>>
>>> The perl script to recreate this problem is very similar to xfstest 273.
>>> I use that because it avoids all the filesystem mount/unmount that
>>> happen between the test 273 loops. You can build the log size that you
>>> want to test, create the directories and let it run until it hangs.
>>>
>>
>> I tested xfstest 273, and it looks like it exhibits a different issue than
>> the OP in this thread.
>> For example, if I run this test in a while [1] loop, I get the following
>> backtrace:
>>
>> [16413.073946] XFS (sda5): Invalid block length (0xfffff48b) for buffer
>
> That looks bad. How big is the log on this filesystem?
>
The test and scratch partitions were created with the following commands:
mkfs.xfs -b size=1024 -l size=576b /dev/sda5
mkfs.xfs -b size=1024 -l size=576b /dev/sda6
>> [16413.073963] BUG: unable to handle kernel NULL pointer dereference at
>> 0000000000000130
>> [16413.074274] IP: [<ffffffffa02bb870>] uuid_is_nil+0x10/0x50 [xfs]
>
> I can't really see how this function can get a null pointer
> dereference. It checks the pointer passed in for being null before
> doing anything, and otherwise it just increments and dereferences
> the char pointer 16 times. I can't see how that results in a NULL
> being dereferenced - I might just be blind though.
>
Yea, this is odd. What I'm really trying to accomplish is seeing if this
xfstest 273 produces a similar hang to Juerg's original bug. If you've
already run this test and it produced a hang can you post the backtrace
or let me know if it is similar?
Thanks,
--chris
> Cheers,
>
> Dave.
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
next prev parent reply other threads:[~2012-06-12 13:28 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-23 12:09 Still seeing hangs in xlog_grant_log_space Juerg Haefliger
2012-04-23 14:38 ` Dave Chinner
2012-04-23 15:33 ` Juerg Haefliger
2012-04-23 23:58 ` Dave Chinner
2012-04-24 8:55 ` Juerg Haefliger
2012-04-24 12:07 ` Dave Chinner
2012-04-24 18:26 ` Juerg Haefliger
2012-04-25 22:38 ` Dave Chinner
2012-04-26 12:37 ` Juerg Haefliger
2012-04-26 22:44 ` Dave Chinner
2012-04-26 23:00 ` Juerg Haefliger
2012-04-26 23:07 ` Dave Chinner
2012-04-27 9:04 ` Juerg Haefliger
2012-04-27 11:09 ` Dave Chinner
2012-04-27 13:07 ` Juerg Haefliger
2012-05-05 7:44 ` Juerg Haefliger
2012-05-07 17:19 ` Ben Myers
2012-05-09 7:54 ` Juerg Haefliger
2012-05-10 16:11 ` Chris J Arges
2012-05-10 21:53 ` Mark Tinguely
2012-05-16 18:42 ` Ben Myers
2012-05-16 19:03 ` Chris J Arges
2012-05-16 21:29 ` Mark Tinguely
2012-05-18 10:10 ` Dave Chinner
2012-05-18 14:42 ` Mark Tinguely
2012-05-22 22:59 ` Dave Chinner
2012-06-06 15:00 ` Chris J Arges
2012-06-07 0:49 ` Dave Chinner
2012-05-17 20:55 ` Chris J Arges
2012-05-18 16:53 ` Chris J Arges
2012-05-18 17:19 ` Ben Myers
2012-05-19 7:28 ` Juerg Haefliger
2012-05-21 17:11 ` Ben Myers
2012-05-24 5:45 ` Juerg Haefliger
2012-05-24 14:23 ` Ben Myers
2012-05-07 22:59 ` Dave Chinner
2012-05-09 7:35 ` Dave Chinner
2012-05-09 21:07 ` Mark Tinguely
2012-05-10 2:10 ` Mark Tinguely
2012-05-18 9:37 ` Dave Chinner
2012-05-18 9:31 ` Dave Chinner
2012-05-24 20:18 ` Peter Watkins
2012-05-25 6:28 ` Juerg Haefliger
2012-05-25 17:03 ` Peter Watkins
2012-06-05 23:54 ` Dave Chinner
2012-06-06 13:40 ` Brian Foster
2012-06-06 17:41 ` Mark Tinguely
2012-06-11 20:42 ` Chris J Arges
2012-06-11 23:53 ` Dave Chinner
2012-06-12 13:28 ` Chris J Arges [this message]
2012-06-06 22:03 ` Mark Tinguely
2012-06-06 23:04 ` Brian Foster
2012-06-07 1:35 ` Dave Chinner
2012-06-07 14:16 ` Brian Foster
2012-06-08 0:28 ` Dave Chinner
2012-06-08 17:09 ` Ben Myers
2012-06-11 20:59 ` Mark Tinguely
2012-06-05 15:21 ` Chris J Arges
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4FD74406.7000602@canonical.com \
--to=chris.j.arges@canonical.com \
--cc=david@fromorbit.com \
--cc=xfs@oss.sgi.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.