On Wed, May 09, 2012 at 11:24:28AM +0800, Miao Xie wrote:
> Did you apply the trylock patchs I sent before?
20120429 [PATCH 1/2] vfs: re-implement writeback_inodes_sb(_nr)_if_idle() and
rename them
20120429 [PATCH 2/2] Btrfs: flush all the dirty pages if
try_to_writeback_inodes_sb_nr() fails
On Tue, 8 May 2012 17:33:26 +0200, David Sterba wrote:
> On Tue, May 08, 2012 at 06:38:01PM +0800, Miao Xie wrote:
>> I think this method can not fix the problem safely because if the other
>> background threads(not the cleaner) call shrink_delalloc(), the problem
>> can still occur.
>
> And it do
On Tue, May 08, 2012 at 06:38:01PM +0800, Miao Xie wrote:
> I think this method can not fix the problem safely because if the other
> background threads(not the cleaner) call shrink_delalloc(), the problem
> can still occur.
And it does not indeed fix the problem completely, I found xfstests/269
h
On Mon, 30 Apr 2012 18:41:39 +0200, David Sterba wrote:
> On Fri, Apr 27, 2012 at 06:55:13PM +0800, Miao Xie wrote:
>> But I found you add a trylock for ->s_umount in cleaner_kthread(), this
>> method
>> can fix the deadlock problem, I think. It may be introduced by the other
>> patch,
>> could y
On Fri, Apr 27, 2012 at 06:55:13PM +0800, Miao Xie wrote:
> But I found you add a trylock for ->s_umount in cleaner_kthread(), this method
> can fix the deadlock problem, I think. It may be introduced by the other
> patch,
> could you send that patch to me? I found if we fail to trylock
> ->clean
>> The reason the deadlock is that:
>> Task Btrfs-cleaner
>> umount()
>> down_write(&s->s_umount)
>> sync_filesystem()
>> do auto-defragment and produce
>> lots of dirty page
On Thu, Apr 26, 2012 at 10:58:04AM +0800, Miao Xie wrote:
> The reason the deadlock is that:
> TaskBtrfs-cleaner
> umount()
> down_write(&s->s_umount)
> sync_filesystem()
> do auto-defragment and produce
>
The reason the deadlock is that:
Task Btrfs-cleaner
umount()
down_write(&s->s_umount)
sync_filesystem()
do auto-defragment and produce
lots of dirty pages
close_ctree()
