On Friday, January 18, 2013 11:35:40 PM Sedat Dilek wrote: > On Fri, Jan 18, 2013 at 11:20 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > > On Friday, January 18, 2013 11:11:07 PM Sedat Dilek wrote: > >> On Fri, Jan 18, 2013 at 5:37 AM, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote: > >> > Hi all, > >> > > >> > Changes since 20130117: > >> > > >> > Undropped tree: samung > >> > > >> > The powerpc tree still had a build failure. > >> > > >> > The driver-core tree gained a build failure for which I applied a merge > >> > fix patch. > >> > > >> > The gpio-lw tree gained a build failure so I used the version from > >> > next-20130117. > >> > > >> > The samsung tree lost the majority of its conflicts but gained more > >> > against the arm-soc and slave-dma tree. > >> > > >> > ---------------------------------------------------------------------------- > >> > > >> > >> From my dmesg diff-file: > >> > >> +[ 288.730849] PM: Syncing filesystems ... done. > >> +[ 294.050498] Freezing user space processes ... (elapsed 0.04 seconds) done. > >> +[ 294.097024] Freezing remaining freezable tasks ... > >> +[ 314.098849] Freezing of tasks failed after 20.01 seconds (1 tasks > >> refusing to freeze, wq_busy=0): > >> +[ 314.098862] jbd2/loop0-8 D ffffffff8180d780 0 297 2 0x00000000 > >> +[ 314.098865] ffff880117ec5b68 0000000000000046 ffff880117ec5b08 > >> ffffffff81044c29 > >> +[ 314.098868] ffff88011829dc80 ffff880117ec5fd8 ffff880117ec5fd8 > >> ffff880117ec5fd8 > >> +[ 314.098871] ffff880119b34560 ffff88011829dc80 ffff880117ec5b68 > >> ffff88011fad4738 > >> +[ 314.098873] Call Trace: > >> +[ 314.098881] [<ffffffff81044c29>] ? default_spin_lock_flags+0x9/0x10 > >> +[ 314.098885] [<ffffffff811c63e0>] ? __wait_on_buffer+0x30/0x30 > >> +[ 314.098888] [<ffffffff816b4b59>] schedule+0x29/0x70 > >> +[ 314.098890] [<ffffffff816b4c2f>] io_schedule+0x8f/0xd0 > >> +[ 314.098892] [<ffffffff811c63ee>] sleep_on_buffer+0xe/0x20 > >> +[ 314.098896] [<ffffffff816b342f>] __wait_on_bit+0x5f/0x90 > >> +[ 314.098898] [<ffffffff811c5aa1>] ? submit_bh+0x121/0x1e0 > >> +[ 314.098900] [<ffffffff811c63e0>] ? __wait_on_buffer+0x30/0x30 > >> +[ 314.098903] [<ffffffff816b34dc>] out_of_line_wait_on_bit+0x7c/0x90 > >> +[ 314.098906] [<ffffffff8107eb00>] ? autoremove_wake_function+0x40/0x40 > >> +[ 314.098909] [<ffffffff811c63de>] __wait_on_buffer+0x2e/0x30 > >> +[ 314.098913] [<ffffffff8128a6a1>] > >> jbd2_journal_commit_transaction+0x1791/0x1960 > >> +[ 314.098917] [<ffffffff8109269d>] ? sched_clock_cpu+0xbd/0x110 > >> +[ 314.098920] [<ffffffff8107eac0>] ? add_wait_queue+0x60/0x60 > >> +[ 314.098923] [<ffffffff81069fbf>] ? try_to_del_timer_sync+0x4f/0x70 > >> +[ 314.098925] [<ffffffff8128e4e8>] kjournald2+0xb8/0x240 > >> +[ 314.098927] [<ffffffff8107eac0>] ? add_wait_queue+0x60/0x60 > >> +[ 314.098929] [<ffffffff8128e430>] ? commit_timeout+0x10/0x10 > >> +[ 314.098931] [<ffffffff8107ded0>] kthread+0xc0/0xd0 > >> +[ 314.098933] [<ffffffff8107de10>] ? flush_kthread_worker+0xb0/0xb0 > >> +[ 314.098936] [<ffffffff816be52c>] ret_from_fork+0x7c/0xb0 > >> +[ 314.098938] [<ffffffff8107de10>] ? flush_kthread_worker+0xb0/0xb0 > >> +[ 314.098969] > >> +[ 314.098970] Restarting kernel threads ... done. > >> +[ 314.099052] Restarting tasks ... done. > >> > >> Please, have a lot at it. > > > > This is a freezer failure while freezing kernel threads, so I don't think it's > > related to ACPI or PM directly. > > > > Does it happen on every suspend? > > > > No, I only did one S/R. Well, it would be good to try to reproduce it. > I have built a 2nd new kernel where I pulled-in latest pm.git#linux-next. > With this kernel two S/Rs were fine - but that says not much. The linux-pm.git tree doesn't contain any changes related to the freezer. It most likely is something that removed a try_to_freeze() check from a freezable kernel thread, but in that case the issue should be 100% reproducible. Thanks, Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center.
