On Wed, 9 Feb 2011 16:23:24 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote: > There was a big bug. Anyway, thank you for adding new bad_page for memcg. I hope this is the last time we'd see the bad_page for memcg ;) > == > > mem_cgroup_uncharge_page() should be called in all failure case > after mem_cgroup_charge_newpage() is called in > huge_memory.c::collapse_huge_page() > > [ 4209.076861] BUG: Bad page state in process khugepaged pfn:1e9800 > [ 4209.077601] page:ffffea0006b14000 count:0 mapcount:0 mapping: (null) index:0x2800 > [ 4209.078674] page flags: 0x40000000004000(head) > [ 4209.079294] pc:ffff880214a30000 pc->flags:2146246697418756 pc->mem_cgroup:ffffc9000177a000 > [ 4209.082177] (/A) > [ 4209.082500] Pid: 31, comm: khugepaged Not tainted 2.6.38-rc3-mm1 #1 > [ 4209.083412] Call Trace: > [ 4209.083678] [<ffffffff810f4454>] ? bad_page+0xe4/0x140 > [ 4209.084240] [<ffffffff810f53e6>] ? free_pages_prepare+0xd6/0x120 > [ 4209.084837] [<ffffffff8155621d>] ? rwsem_down_failed_common+0xbd/0x150 > [ 4209.085509] [<ffffffff810f5462>] ? __free_pages_ok+0x32/0xe0 > [ 4209.086110] [<ffffffff810f552b>] ? free_compound_page+0x1b/0x20 > [ 4209.086699] [<ffffffff810fad6c>] ? __put_compound_page+0x1c/0x30 > [ 4209.087333] [<ffffffff810fae1d>] ? put_compound_page+0x4d/0x200 > [ 4209.087935] [<ffffffff810fb015>] ? put_page+0x45/0x50 > [ 4209.097361] [<ffffffff8113f779>] ? khugepaged+0x9e9/0x1430 > [ 4209.098364] [<ffffffff8107c870>] ? autoremove_wake_function+0x0/0x40 > [ 4209.099121] [<ffffffff8113ed90>] ? khugepaged+0x0/0x1430 > [ 4209.099780] [<ffffffff8107c236>] ? kthread+0x96/0xa0 > [ 4209.100452] [<ffffffff8100dda4>] ? kernel_thread_helper+0x4/0x10 > [ 4209.101214] [<ffffffff8107c1a0>] ? kthread+0x0/0xa0 > [ 4209.101842] [<ffffffff8100dda0>] ? kernel_thread_helper+0x0/0x10 > > > Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Acked-by: Daisuke Nishimura <nishimura@xxxxxxxxxxxxxxxxx> Thanks, Daisuke Nishimura. -- 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>