Re: 3.15rc5 deadlock

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On Wed, May 14, 2014 at 05:13:20PM -0600, Chris Murphy wrote:
> 
> On May 14, 2014, at 2:55 PM, Marc MERLIN <marc@xxxxxxxxxxx> wrote:
> 
> > INFO: task btrfs:13329 blocked for more than 120 seconds.
> 
> Pretty much anytime blocked for more than 120 seconds is reported, devs ask for sysrq-w. Typically that translates into three steps:
> 
> echo 1 > /proc/sys/kernel/sysrq
> echo w > /proc/sysrq-trigger
> dmesg
> 
> https://www.kernel.org/doc/Documentation/sysrq.txt
 
I took that just in case, but it's big (too long to be accepted on the
list), and inconvenient to share each time.

I was hoping the output of
legolas:~# ps -eo pid,user,args,wchan  | grep  btrfs

would do, but if not, I can upload the sysrq I have in my syslog.

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/                         | PGP 1024R/763BE901
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