On Wed, 16 Mar 2011 10:25:16 -0500 Alex Villac____s Lasso <avillaci@xxxxxxxxxxxxxxxxx> wrote: > El 15/03/11 18:19, Andrew Morton escribi__: > > On Tue, 15 Mar 2011 17:53:16 -0500 > > Alex Villac____s Lasso<avillaci@xxxxxxxxxxxxxxxxx> wrote: > > > >> El 15/03/11 15:53, Andrew Morton escribi__: > >>> rofl, will we ever fix this. > >> Does this mean there is already a duplicate of this issue? If so, which one? > > Nothing specific. Nonsense like this has been happening for at least a > > decade and it never seems to get a lot better. > > > >>> Please enable sysrq and do a sysrq-w when the tasks are blocked so we > >>> can find where things are getting stuck. Please avoid email client > >>> wordwrapping when sending us the sysrq output. > >>> > Posted sysrq-w report into original bug report to avoid email word-wrap. https://bugzilla.kernel.org/attachment.cgi?id=50952 Interesting bits: [70874.969550] thunderbird-bin D 000000010434e04e 0 32283 32279 0x00000080 [70874.969553] ffff88011ba91838 0000000000000086 ffff880100000000 0000000000013880 [70874.969557] 0000000000013880 ffff88010a231780 ffff88011ba91fd8 0000000000013880 [70874.969560] 0000000000013880 0000000000013880 0000000000013880 ffff88011ba91fd8 [70874.969564] Call Trace: [70874.969567] [<ffffffff810d7ed3>] ? sync_page+0x0/0x4d [70874.969569] [<ffffffff810d7ed3>] ? sync_page+0x0/0x4d [70874.969572] [<ffffffff8147cedb>] io_schedule+0x47/0x62 [70874.969575] [<ffffffff810d7f1c>] sync_page+0x49/0x4d [70874.969577] [<ffffffff8147d36a>] __wait_on_bit+0x48/0x7b [70874.969580] [<ffffffff810d8100>] wait_on_page_bit+0x72/0x79 [70874.969583] [<ffffffff8106cdb4>] ? wake_bit_function+0x0/0x31 [70874.969586] [<ffffffff8111833c>] migrate_pages+0x1ac/0x38d [70874.969589] [<ffffffff8110d6d7>] ? compaction_alloc+0x0/0x2a4 [70874.969592] [<ffffffff8110ddfd>] compact_zone+0x3f4/0x60e [70874.969595] [<ffffffff8110e1dc>] compact_zone_order+0xc2/0xd1 [70874.969599] [<ffffffff8110e27f>] try_to_compact_pages+0x94/0xea [70874.969602] [<ffffffff810de916>] __alloc_pages_direct_compact+0xa9/0x1a5 [70874.969605] [<ffffffff810ddbb8>] ? drain_local_pages+0x0/0x17 [70874.969607] [<ffffffff810df0b0>] __alloc_pages_nodemask+0x69e/0x766 [70874.969610] [<ffffffff81113701>] ? __slab_free+0x6d/0xf6 [70874.969614] [<ffffffff8110c0de>] alloc_pages_vma+0xec/0xf1 [70874.969617] [<ffffffff8111be1c>] do_huge_pmd_anonymous_page+0xbf/0x267 [70874.969620] [<ffffffff810f2497>] ? pmd_offset+0x19/0x40 [70874.969623] [<ffffffff810f5c70>] handle_mm_fault+0x15d/0x20f [70874.969626] [<ffffffff8100f26a>] ? arch_get_unmapped_area_topdown+0x195/0x28f [70874.969629] [<ffffffff8148178c>] do_page_fault+0x33b/0x35d [70874.969632] [<ffffffff810fb07d>] ? do_mmap_pgoff+0x29a/0x2f4 [70874.969635] [<ffffffff8112dcee>] ? path_put+0x22/0x27 [70874.969638] [<ffffffff8147f145>] page_fault+0x25/0x30 [70874.969731] gedit D 000000010434dfb0 0 32356 1 0x00000080 [70874.969734] ffff8800982ab558 0000000000000082 ffff880102400001 0000000000013880 [70874.969737] 0000000000013880 ffff880117408000 ffff8800982abfd8 0000000000013880 [70874.969741] 0000000000013880 0000000000013880 0000000000013880 ffff8800982abfd8 [70874.969744] Call Trace: [70874.969747] [<ffffffff8147cedb>] io_schedule+0x47/0x62 [70874.969750] [<ffffffff8121c403>] get_request_wait+0x10a/0x197 [70874.969753] [<ffffffff8106cd77>] ? autoremove_wake_function+0x0/0x3d [70874.969756] [<ffffffff8121ccc4>] __make_request+0x2c8/0x3e0 [70874.969759] [<ffffffff8111487d>] ? kmem_cache_alloc+0x73/0xeb [70874.969762] [<ffffffff8121bb67>] generic_make_request+0x2bc/0x336 [70874.969765] [<ffffffff811213a5>] ? lookup_page_cgroup+0x36/0x4c [70874.969768] [<ffffffff8121bcc1>] submit_bio+0xe0/0xff [70874.969770] [<ffffffff8114d72d>] ? bio_alloc_bioset+0x4d/0xc4 [70874.969773] [<ffffffff810edf1f>] ? inc_zone_page_state+0x2d/0x2f [70874.969776] [<ffffffff81149274>] submit_bh+0xe8/0x10e [70874.969779] [<ffffffff8114b9fa>] __block_write_full_page+0x1ea/0x2da [70874.969782] [<ffffffffa0689202>] ? udf_get_block+0x0/0x115 [udf] [70874.969785] [<ffffffff8114a640>] ? end_buffer_async_write+0x0/0x12d [70874.969788] [<ffffffff8114a640>] ? end_buffer_async_write+0x0/0x12d [70874.969791] [<ffffffffa0689202>] ? udf_get_block+0x0/0x115 [udf] [70874.969794] [<ffffffff8114bb76>] block_write_full_page_endio+0x8c/0x98 [70874.969796] [<ffffffff8114bb97>] block_write_full_page+0x15/0x17 [70874.969800] [<ffffffffa0686027>] udf_writepage+0x18/0x1a [udf] [70874.969803] [<ffffffff81117fed>] move_to_new_page+0x106/0x195 [70874.969806] [<ffffffff811183de>] migrate_pages+0x24e/0x38d [70874.969809] [<ffffffff8110d6d7>] ? compaction_alloc+0x0/0x2a4 [70874.969812] [<ffffffff8110ddfd>] compact_zone+0x3f4/0x60e [70874.969815] [<ffffffff81049c78>] ? load_balance+0xcb/0x6b0 [70874.969818] [<ffffffff8110e1dc>] compact_zone_order+0xc2/0xd1 [70874.969821] [<ffffffff8110e27f>] try_to_compact_pages+0x94/0xea [70874.969824] [<ffffffff810de916>] __alloc_pages_direct_compact+0xa9/0x1a5 [70874.969827] [<ffffffff810dee79>] __alloc_pages_nodemask+0x467/0x766 [70874.969830] [<ffffffff810fcfd3>] ? anon_vma_alloc+0x1a/0x1c [70874.969833] [<ffffffff81048a30>] ? get_parent_ip+0x11/0x41 [70874.969833] [<ffffffff8110c0de>] alloc_pages_vma+0xec/0xf1 [70874.969833] [<ffffffff8123430e>] ? rb_insert_color+0x66/0xe1 [70874.969833] [<ffffffff8111be1c>] do_huge_pmd_anonymous_page+0xbf/0x267 [70874.969833] [<ffffffff810f2497>] ? pmd_offset+0x19/0x40 [70874.969833] [<ffffffff810f5c70>] handle_mm_fault+0x15d/0x20f [70874.969833] [<ffffffff8100f298>] ? arch_get_unmapped_area_topdown+0x1c3/0x28f [70874.969833] [<ffffffff8148178c>] do_page_fault+0x33b/0x35d [70874.969833] [<ffffffff810fb07d>] ? do_mmap_pgoff+0x29a/0x2f4 [70874.969833] [<ffffffff8112dcee>] ? path_put+0x22/0x27 [70874.969833] [<ffffffff8147f145>] page_fault+0x25/0x30 So it appears that the system is full of dirty pages against a slow device and your foreground processes have got stuck in direct reclaim -> compaction -> migration. That's Mel ;) What happened to the plans to eliminate direct reclaim? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>