On Mon, Jan 14, 2013 at 1:10 AM, Jan Engelhardt <jengelh@xxxxxxx> wrote: > > I thought these were fixed, but I just got one on 3.7.1 on x86_64. > > [648141.344931] INFO: task sync:10395 blocked for more than 480 seconds. > [648141.344935] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [648141.344937] sync D ffff88074c0bc760 0 10395 9926 0x00000000 > [648141.344942] ffff880813dbbdc8 0000000000000086 ffff88074c0bc380 ffff880813dbbfd8 > [648141.344947] ffff880813dbbfd8 0000000000012ac0 ffff880817d30340 ffff88074c0bc380 > [648141.344951] ffff8802449d46c8 7fffffffffffffff 7fffffffffffffff ffff880813dbbeb0 > [648141.344955] Call Trace: > [648141.344969] [<ffffffff813ebc8b>] schedule_timeout+0x1c/0xf7 > [648141.344975] [<ffffffff813ec714>] wait_for_common+0x9a/0x115 > [648141.344982] [<ffffffff8112ee60>] sync_inodes_sb+0xaa/0x18c > [648141.344988] [<ffffffff811125ee>] iterate_supers+0x63/0xb4 > [648141.344993] [<ffffffff81131fdc>] sys_sync+0x2e/0x81 > [648141.344999] [<ffffffff813f39ed>] system_call_fastpath+0x1a/0x1f > [648141.345025] [<00007f85ffdef117>] 0x7f85ffdef116 > > How can I check how much there is left to sync? > /proc/meminfo says all has been written out: > > Dirty: 424 kB > Writeback: 0 kB > > So if not that, what really is blocking processes? Hi Jan, Can you test w/ Linux v3.7.2? Not sure but this sounds like a fix for your problem: commit 9359dd031b11100a3532ef7bfc04f2fc7f23c33b "mm: fix calculation of dirtyable memory" It is also good to have a look at queued-up patches for -stable kernels (in [2] for Linux v3.7.y). ( Just a general recommendation ). Hope this helps you! Regards, - Sedat - [1] http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=commitdiff;h=9359dd031b11100a3532ef7bfc04f2fc7f23c33b [2] http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git;a=blob;f=queue-3.7/series > -- > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
