Hand in Raid-5 code
From: Dag Nygren <hidden>
Date: 2012-02-05 16:55:58
Hi! Using lessfs on top of an XFS on top on a software RAID-5 and see this freeze happening about once a week. Usually during heavy load. Feb 5 02:51:04 mythserv kernel: INFO: task lessfs:2687 blocked for more than 120 seconds. Feb 5 02:51:04 mythserv kernel: “echo 0 > /proc/sys/kernel/hung_task_timeout_secs” disables this message. Feb 5 02:51:04 mythserv kernel: lessfs D ffff88006faf1998 0 2687 1 0×00000000 Feb 5 02:51:04 mythserv kernel: ffff880066579828 0000000000000086 ffff8800665797b8 ffffffff00000000 Feb 5 02:51:04 mythserv kernel: ffff88006faf1620 0000000000013300 ffff880066579fd8 ffff880066578010 Feb 5 02:51:04 mythserv kernel: ffff880066579fd8 0000000000013300 ffffffff81655020 ffff88006faf1620 Feb 5 02:51:04 mythserv kernel: Call Trace: Feb 5 02:51:04 mythserv kernel: [] schedule+0x3f/0×60 Feb 5 02:51:04 mythserv kernel: [] get_active_stripe+0x2ea/0×790 [raid456] Feb 5 02:51:04 mythserv kernel: [] ? try_to_wake_up+0x2b0/0x2b0 Feb 5 02:51:04 mythserv kernel: [] make_request+0x1ae/0×460 [raid456] Feb 5 02:51:04 mythserv kernel: [] ? wake_up_bit+0×40/0×40 Feb 5 02:51:04 mythserv kernel: [] md_make_request+0xd5/0×200 Feb 5 02:51:04 mythserv kernel: [] generic_make_request+0xbf/0xf0 Feb 5 02:51:04 mythserv kernel: [] submit_bio+0×85/0×110 Feb 5 02:51:04 mythserv kernel: [] ? __bio_add_page+0×110/0×250 Feb 5 02:51:04 mythserv kernel: [] xfs_submit_ioend_bio+0×57/0×80 [xfs] Feb 5 02:51:04 mythserv kernel: [] xfs_submit_ioend+0xf6/0×110 [xfs] Feb 5 02:51:04 mythserv kernel: [] xfs_vm_writepage+0×230/0×500 [xfs] Feb 5 02:51:04 mythserv kernel: [] __writepage+0×17/0×40 Feb 5 02:51:04 mythserv kernel: [] write_cache_pages+0×221/0x4a0 Feb 5 02:51:04 mythserv kernel: [] ? tomoyo_init_request_info+0x3f/0×70 Feb 5 02:51:04 mythserv kernel: [] ? set_page_dirty+0×70/0×70 Feb 5 02:51:04 mythserv kernel: [] generic_writepages+0×51/0×80 Feb 5 02:51:04 mythserv kernel: [] xfs_vm_writepages+0×53/0×70 [xfs] Feb 5 02:51:04 mythserv kernel: [] do_writepages+0×21/0×40 Feb 5 02:51:04 mythserv kernel: [] __filemap_fdatawrite_range+0x5b/0×60 Feb 5 02:51:04 mythserv kernel: [] filemap_write_and_wait_range+0x5a/0×80 Feb 5 02:51:04 mythserv kernel: [] xfs_file_fsync+0×68/0x2d0 [xfs] Feb 5 02:51:04 mythserv kernel: [] vfs_fsync_range+0x2b/0×40 Feb 5 02:51:04 mythserv kernel: [] vfs_fsync+0x1c/0×20 Feb 5 02:51:04 mythserv kernel: [] do_fsync+0x3a/0×60 Feb 5 02:51:04 mythserv kernel: [] sys_fsync+0×10/0×20 Feb 5 02:51:04 mythserv kernel: [] system_call_fastpath+0×16/0x1b Any hints? Or any debugging I can do to help? I did find a similar cas from 2008, but that is supposed to be fixed now. This also started after updating the kernel to the 3.x series. At the moment using 3.2.2 and still seeing it. -- Dag Nygren email: dag@newtech.fi Oy Espoon NewTech Ab phone: +358 9 8024910 Träsktorpet 3 fax: +358 9 8024916 02360 ESBO Mobile: +358 400 426312 FINLAND -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html