lkml.org 
[lkml]   [2011]   [Mar]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.39-rc0: umount tmpfs hangs
On Mon, Mar 21, 2011 at 05:24:08AM +0300, Alexander Beregalov wrote:
> Hi
>
> kernel is 2.6.38-06507-ga952baa
>
> /etc/init.d/swap stop
> runs
> umount -a -t tmpfs
>
> which is hangs at
>
> $cat /proc/4453/stack
> [<c1066332>] rcu_barrier_sched+0x32/0x40
> [<c109fdca>] deactivate_locked_super+0x3a/0x60
> [<c10a05f6>] deactivate_super+0x46/0x60
> [<c10b6f2a>] mntput_no_expire+0x5a/0x90
> [<c10b7a6d>] sys_umount+0x5d/0x300
> [<c10b7d29>] sys_oldumount+0x19/0x20
> [<c136eb50>] sysenter_do_call+0x12/0x36
> [<ffffffff>] 0xffffffff

rcu_barrier() hanging for some reason... I really wonder what's going
on there - missing rcu_read_unlock()? Could you try to reproduce that
sucker and, if possible, bisect it?


\
 
 \ /
  Last update: 2011-03-21 04:41    [W:0.038 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site