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Date: Mon, 12 Sep 2011 16:32:47 +0800 From: Lin Ming <mlin@...pku.edu.cn> To: Justin Piszcz <jpiszcz@...idpixels.com> Cc: linux-kernel@...r.kernel.org, Alan Piszcz <ap@...arrain.com> Subject: Re: 3.0.1: pagevec_lookup+0x1d/0x30, SLAB issues? [again w/DEBUG_VM & SLAB_DEBUG enabled] On Mon, Sep 12, 2011 at 3:52 PM, Justin Piszcz <jpiszcz@...idpixels.com> wrote: > > > On Sun, 11 Sep 2011, Justin Piszcz wrote: > >> >> >> On Sun, 11 Sep 2011, Justin Piszcz wrote: >> >>> Hi, >>> >>> With 3.0.1 now and all options compiled in and threadirqs removed, I get >>> the same error this user is seeing: >>> http://www.gossamer-threads.com/lists/linux/kernel/1424997 >>> >> >> Hello Lin, >> >> I missed your mail (sender IP is in a CIDR blacklist), disabled & >> whitelisted for now: >> http://marc.info/?l=linux-kernel&m=131567477126674&w=2 >> >> I've enabled this and I will post a new e-mail / output if it happens >> again with debug enabled for SLAB. >> >> Response to your e-mail: >> >>> Could you tell how to reproduce this? >> >> Running a lot of processes at the same time (memory/cpu+i/o) >> >>> And would you please turn on more debug options to capture more info? >> >> Yup, done now; however, I am using SLAB, not SLUB; so I've enabled: >> >> -> [*] Debug slab memory allocations -> [*] Memory leak debugging -> [*] >> Debug VM >> >>> CONFIG_SLUB_DEBUG=y >>> CONFIG_SLUB_DEBUG_ON=y >>> CONFIG_DEBUG_VM=y >> >> Please let me know if there are any other options you think would be >> useful >> to enable or if this should be good, if it recurs again-- as noted above >> I will post an update. >> >> Justin. >> > > Hi, > > With the debug options enabled as mentioned above: > > [27336.007038] BUG: soft lockup - CPU#9 stuck for 22s! [kswapd1:1045] > [27336.007043] CPU 9 [27336.007047] Pid: 1045, comm: kswapd1 Not tainted > 3.0.1 #7 Supermicro X8DTH-i/6/iF/6F/X8DTH > [27336.007053] RIP: 0010:[<ffffffff8107a981>] [<ffffffff8107a981>] > find_get_pages+0x61/0x150 > [27336.007062] RSP: 0018:ffff880626783b50 EFLAGS: 00000246 > [27336.007065] RAX: 0000000000000000 RBX: ffff880626783ba0 RCX: > 0000000000000000 > [27336.007067] RDX: 0000000000000000 RSI: 000000000000000e RDI: > ffffea000f617890 > [27336.007070] RBP: ffff880626783ba0 R08: 0000000000000000 R09: > 000000000000000a > [27336.007072] R10: 0000000000000009 R11: ffff8803badfde18 R12: > ffffffff816481ce > [27336.007075] R13: ffffffff810821cd R14: ffff880626783ad0 R15: > ffff88063fffbe00 > [27336.007078] FS: 0000000000000000(0000) GS:ffff880c3fc60000(0000) > knlGS:0000000000000000 > [27336.007081] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > [27336.007084] CR2: 00007fbaef0fc000 CR3: 0000000001a43000 CR4: > 00000000000006e0 > [27336.007086] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [27336.007089] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > 0000000000000400 > [27336.007092] Process kswapd1 (pid: 1045, threadinfo ffff880626782000, task > ffff880626d2a840) > [27336.007094] Stack: > [27336.007096] ffff880c3fc6d520 0000000000000005 ffff880070743320 > ffff880070743328 > [27336.007103] ffff880626783ba0 ffff880626783be0 000000000000041c > ffffffffffffffff > [27336.007108] ffff880070743320 ffffea000f617820 ffff880626783bc0 > ffffffff8108597d > [27336.007114] Call Trace: > [27336.007121] [<ffffffff8108597d>] pagevec_lookup+0x1d/0x30 > [27336.007125] [<ffffffff8108607f>] invalidate_mapping_pages+0x5f/0x170 > [27336.007132] [<ffffffff810d37b5>] shrink_icache_memory+0x2d5/0x320 > [27336.007139] [<ffffffff81086f5d>] shrink_slab+0x11d/0x190 > [27336.007144] [<ffffffff81089d6a>] balance_pgdat+0x4fa/0x6a0 > [27336.007148] [<ffffffff81089fc3>] kswapd+0xb3/0x250 > [27336.007153] [<ffffffff8104fea0>] ? abort_exclusive_wait+0xb0/0xb0 > [27336.007157] [<ffffffff81089f10>] ? balance_pgdat+0x6a0/0x6a0 > [27336.007160] [<ffffffff8104f457>] kthread+0x87/0x90 > [27336.007167] [<ffffffff81648814>] kernel_thread_helper+0x4/0x10 > [27336.007171] [<ffffffff8104f3d0>] ? kthread_flush_work_fn+0x10/0x10 > [27336.007175] [<ffffffff81648810>] ? gs_change+0xb/0xb > [27336.007177] Code: 89 ea e8 33 95 22 00 85 c0 89 c6 0f 84 01 01 00 00 4d > 89 e7 31 c9 31 d2 66 90 49 8b 07 48 8b 38 48 85 ff 74 5b 40 f6 c7 01 75 7a > [27336.007198] 63 83 44 e0 ff ff a9 00 ff ff 07 0f 85 8d 00 00 00 44 8b 47 > [27336.007209] Call Trace: > [27336.007213] [<ffffffff8108597d>] pagevec_lookup+0x1d/0x30 > [27336.007217] [<ffffffff8108607f>] invalidate_mapping_pages+0x5f/0x170 > [27336.007222] [<ffffffff810d37b5>] shrink_icache_memory+0x2d5/0x320 > [27336.007226] [<ffffffff81086f5d>] shrink_slab+0x11d/0x190 > [27336.007229] [<ffffffff81089d6a>] balance_pgdat+0x4fa/0x6a0 > [27336.007233] [<ffffffff81089fc3>] kswapd+0xb3/0x250 > [27336.007237] [<ffffffff8104fea0>] ? abort_exclusive_wait+0xb0/0xb0 > [27336.007241] [<ffffffff81089f10>] ? balance_pgdat+0x6a0/0x6a0 > [27336.007244] [<ffffffff8104f457>] kthread+0x87/0x90 > [27336.007248] [<ffffffff81648814>] kernel_thread_helper+0x4/0x10 > [27336.007252] [<ffffffff8104f3d0>] ? kthread_flush_work_fn+0x10/0x10 > [27336.007256] [<ffffffff81648810>] ? gs_change+0xb/0xb No more info got. Could you try to make a test case which can trigger this bug reliably? You may also try some benchmarks, for example, fio, ffsb, etc. Lin Ming > > Justin. -- 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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