Re: Frozen transaction

2012-10-09 Thread David Sterba
On Tue, Oct 09, 2012 at 09:37:48AM +0200, Olivier Bonvalet wrote: on one system I have a frozen transaction since more than 24 hours, without any IO. I can't umount the partition, delete a snapshot or write anything. I try to reboot the system, but the problem is still present. The processes

Re: Frozen transaction

2012-10-09 Thread Olivier Bonvalet
Thanks for your reply. On 09/10/2012 11:52, David Sterba wrote: On Tue, Oct 09, 2012 at 09:37:48AM +0200, Olivier Bonvalet wrote: on one system I have a frozen transaction since more than 24 hours, without any IO. I can't umount the partition, delete a snapshot or write anything. I try to

Re: Frozen transaction

2012-10-09 Thread David Sterba
On Tue, Oct 09, 2012 at 12:07:20PM +0200, Olivier Bonvalet wrote: I didn't see any stack entry in /proc/$PID/ ; I will try to find which kernel option export that. CONFIG_STACKTRACE If the problem persists accross reboots, how long after mount does it take to get to this state? Cleaner

[solved] Re: Frozen transaction

2012-10-09 Thread Olivier Bonvalet
On 09/10/2012 14:32, David Sterba wrote: On Tue, Oct 09, 2012 at 12:07:20PM +0200, Olivier Bonvalet wrote: I didn't see any stack entry in /proc/$PID/ ; I will try to find which kernel option export that. CONFIG_STACKTRACE CONFIG_STACKTRACE_SUPPORT=y CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y

Re: [solved] Re: Frozen transaction

2012-10-09 Thread David Sterba
On Tue, Oct 09, 2012 at 03:49:01PM +0200, Olivier Bonvalet wrote: On 09/10/2012 14:32, David Sterba wrote: On Tue, Oct 09, 2012 at 12:07:20PM +0200, Olivier Bonvalet wrote: I didn't see any stack entry in /proc/$PID/ ; I will try to find which kernel option export that. CONFIG_STACKTRACE

Re: [solved] Re: Frozen transaction

2012-10-09 Thread Olivier Bonvalet
On 09/10/2012 16:07, David Sterba wrote: On Tue, Oct 09, 2012 at 03:49:01PM +0200, Olivier Bonvalet wrote: On 09/10/2012 14:32, David Sterba wrote: On Tue, Oct 09, 2012 at 12:07:20PM +0200, Olivier Bonvalet wrote: I didn't see any stack entry in /proc/$PID/ ; I will try to find which kernel

Re: Frozen transaction

2012-10-09 Thread David Sterba
On Tue, Oct 09, 2012 at 04:12:54PM +0200, Olivier Bonvalet wrote: What I didn't understand, is that since 24 hours, there was near 0 IO request done on that device. The cleanup processes was just Ā«frozenĀ», not doing anything visible (no CPU and no IO) ; like a deadlock. Yep, it was a deadlock