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Message-ID: <20090622122615.GA28503@elte.hu> Date: Mon, 22 Jun 2009 14:26:15 +0200 From: Ingo Molnar <mingo@...e.hu> To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Cc: "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>, "nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>, "menage@...gle.com" <menage@...gle.com> Subject: Re: [RFC][PATCH] cgroup: fix permanent wait in rmdir * KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote: > KAMEZAWA Hiroyuki wrote: > > Ingo Molnar wrote: > >> > >> FYI, there's a new cgroup related list corruption warning/crash that > >> i've seen a lot of times in latest -tip tests: > >> > >> [ 478.555544] ------------[ cut here ]------------ > >> [ 478.556523] WARNING: at lib/list_debug.c:26 __list_add+0x70/0xa0() > >> [ 478.556523] Hardware name: > >> [ 478.556523] list_add corruption. next->prev should be prev > >> (ffff88003e640448), but was ffff88003fa1a6e8. (next=ffff88003fa1a8a0). > >> [ 478.556523] Modules linked in: > >> [ 478.556523] Pid: 470, comm: kswapd0 Not tainted 2.6.30-tip #10989 > >> [ 478.556523] Call Trace: > >> [ 478.556523] [<ffffffff81306150>] ? __list_add+0x70/0xa0 > >> [ 478.556523] [<ffffffff810598dc>] warn_slowpath_common+0x8c/0xc0 > >> [ 478.556523] [<ffffffff81059999>] warn_slowpath_fmt+0x69/0x70 > >> [ 478.556523] [<ffffffff81086e3b>] ? __lock_acquired+0x18b/0x2b0 > >> [ 478.556523] [<ffffffff811022f0>] ? page_check_address+0x110/0x1a0 > >> [ 478.556523] [<ffffffff812ebcf2>] ? cpumask_any_but+0x42/0xb0 > >> [ 478.556523] [<ffffffff8108c528>] ? __lock_release+0x38/0x90 > >> [ 478.556523] [<ffffffff811024e1>] ? page_referenced_one+0x91/0x120 > >> [ 478.556523] [<ffffffff81306150>] __list_add+0x70/0xa0 > >> [ 478.556523] [<ffffffff8111dc63>] mem_cgroup_add_lru_list+0x63/0x70 > >> [ 478.556523] [<ffffffff810eaee4>] move_active_pages_to_lru+0xf4/0x180 > >> [ 478.556523] [<ffffffff810eb758>] ? shrink_active_list+0x1f8/0x2a0 > >> [ 478.556523] [<ffffffff810eb758>] ? shrink_active_list+0x1f8/0x2a0 > >> [ 478.556523] [<ffffffff810eb794>] shrink_active_list+0x234/0x2a0 > >> [ 478.556523] [<ffffffff810ec3c3>] shrink_zone+0x173/0x1f0 > >> [ 478.556523] [<ffffffff810ece0a>] balance_pgdat+0x4da/0x4e0 > >> [ 478.556523] [<ffffffff810eb240>] ? isolate_pages_global+0x0/0x60 > >> [ 478.556523] [<ffffffff810ed3b6>] kswapd+0x106/0x150 > >> [ 478.556523] [<ffffffff810752f0>] ? autoremove_wake_function+0x0/0x40 > >> [ 478.556523] [<ffffffff810ed2b0>] ? kswapd+0x0/0x150 > >> [ 478.556523] [<ffffffff8107516e>] kthread+0x9e/0xb0 > >> [ 478.556523] [<ffffffff8100d2ba>] child_rip+0xa/0x20 > >> [ 478.556523] [<ffffffff8100cc40>] ? restore_args+0x0/0x30 > >> [ 478.556523] [<ffffffff81075085>] ? kthreadd+0xb5/0x100 > >> [ 478.556523] [<ffffffff810750d0>] ? kthread+0x0/0xb0 > >> [ 478.556523] [<ffffffff8100d2b0>] ? child_rip+0x0/0x20 > >> [ 478.556523] ---[ end trace 9f3122957c34141e ]--- > >> [ 484.923530] ------------[ cut here ]------------ > >> [ 484.924525] WARNING: at lib/list_debug.c:26 __list_add+0x70/0xa0() > >> [ 484.924525] Hardware name: > >> [ 484.924525] list_add corruption. next->prev should be prev > >> (ffff88003e640448), but was ffff88003fa192e8. (next=ffff88003fa14d88). > >> [ 484.941152] Modules linked in: > >> [ 484.941152] Pid: 470, comm: kswapd0 Tainted: G W 2.6.30-tip > >> #10989 > >> [ 484.941152] Call Trace: > >> [ 484.941152] [<ffffffff81306150>] ? __list_add+0x70/0xa0 > >> [ 484.941152] [<ffffffff810598dc>] warn_slowpath_common+0x8c/0xc0 > >> [ 484.941152] [<ffffffff81059999>] warn_slowpath_fmt+0x69/0x70 > >> [ 484.941152] [<ffffffff81086e3b>] ? __lock_acquired+0x18b/0x2b0 > >> [ 484.941152] [<ffffffff811022f0>] ? page_check_address+0x110/0x1a0 > >> [ 484.941152] [<ffffffff812ebcf2>] ? cpumask_any_but+0x42/0xb0 > >> [ 484.941152] [<ffffffff8108c528>] ? __lock_release+0x38/0x90 > >> [ 484.941152] [<ffffffff811024e1>] ? page_referenced_one+0x91/0x120 > >> [ 484.941152] [<ffffffff81306150>] __list_add+0x70/0xa0 > >> [ 484.941152] [<ffffffff8111dc63>] mem_cgroup_add_lru_list+0x63/0x70 > >> [ 484.941152] [<ffffffff810eaee4>] move_active_pages_to_lru+0xf4/0x180 > >> [ 484.941152] [<ffffffff810eb758>] ? shrink_active_list+0x1f8/0x2a0 > >> [ 484.941152] [<ffffffff810eb758>] ? shrink_active_list+0x1f8/0x2a0 > >> [ 484.941152] [<ffffffff810eb794>] shrink_active_list+0x234/0x2a0 > >> [ 484.941152] [<ffffffff810ec3c3>] shrink_zone+0x173/0x1f0 > >> [ 484.941152] [<ffffffff810ece0a>] balance_pgdat+0x4da/0x4e0 > >> [ 484.941152] [<ffffffff810eb240>] ? isolate_pages_global+0x0/0x60 > >> [ 484.941152] [<ffffffff810ed3b6>] kswapd+0x106/0x150 > >> [ 484.941152] [<ffffffff810752f0>] ? autoremove_wake_function+0x0/0x40 > >> [ 484.941152] [<ffffffff810ed2b0>] ? kswapd+0x0/0x150 > >> [ 484.941152] [<ffffffff8107516e>] kthread+0x9e/0xb0 > >> [ 484.941152] [<ffffffff8100d2ba>] child_rip+0xa/0x20 > >> [ 484.941152] [<ffffffff8100cc40>] ? restore_args+0x0/0x30 > >> [ 484.941152] [<ffffffff81075085>] ? kthreadd+0xb5/0x100 > >> [ 484.941152] [<ffffffff810750d0>] ? kthread+0x0/0xb0 > >> [ 484.941152] [<ffffffff8100d2b0>] ? child_rip+0x0/0x20 > >> [ 484.941152] ---[ end trace 9f3122957c34141f ]--- > >> [ 485.365631] ------------[ cut here ]------------ > >> [ 485.368029] WARNING: at lib/list_debug.c:26 __list_add+0x70/0xa0() > >> > >> has this been reported before? Is there a fix for it i missed? > >> > > Hmm, looks new one. > > > > Maybe related to my latest post which modifies __isolate_lru_page() > > memcg: fix lru rotation in isolate_pages > > > > I'll dig tomorrow, sorry. > > > Ah, while I test 2.6.30-git18 (includes above patch), I don't see > above stack dump (with LIST_DEBUG=y) under quick memory pressure > test... Note, it still occurs even with latest -git (f234012). Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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