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Message-ID: <20131104141012.GA17177@localhost>
Date: Mon, 4 Nov 2013 22:10:12 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Jens Axboe <axboe@...nel.dk>
Cc: virtualization@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org
Subject: [virtio_blk] WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:526
sysfs_add_one()
Hi Jens,
I'm not very sure about this bisect, but anyway it'd be good to inform
you of a possible problem on commit
commit 3a02db083a78c9f3c9b69305ab513f9422d91b08
Author: Jens Axboe <axboe@...nel.dk>
Date: Fri May 24 20:22:33 2013 +0200
virtio_blk: blk-mq support
Pretend we have 4 issue queues.
Signed-off-by: Jens Axboe <axboe@...nel.dk>
===================================================
PARENT COMMIT NOT CLEAN. LOOK OUT FOR WRONG BISECT!
===================================================
+------------------------------------------------------------------------------------+--------------+--------------+
| | 4202782cd8b5 | 25d8333ad6fc |
+------------------------------------------------------------------------------------+--------------+--------------+
| good_boots | 1217 | 16 |
| has_kernel_error_warning | 4664 | 3 |
| BUG:kernel_test_hang | 4422 | 1 |
| INFO:task_blocked_for_more_than_seconds | 118 | |
| Kernel_panic-not_syncing:hung_task:blocked_tasks | 15 | |
| BUG:kernel_test_crashed | 90 | |
| Out_of_memory:Kill_process | 30 | |
| INFO:rcu_sched_detected_stalls_on_CPUs/tasks:(detected_by,t=jiffies,g=,c=,q=) | 15 | |
| INFO:rcu_sched_self-detected_stall_on_CPU(t=jiffies_g=c=q=) | 7 | |
| INFO:NMI_handler(arch_trigger_all_cpu_backtrace_handler)took_too_long_to_run:msecs | 7 | |
| BUG:kernel_early_hang_without_any_printk_output | 1 | |
| page_allocation_failure:order:,mode | 2 | |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 3 | |
| WARNING:CPU:PID:at_fs/sysfs/dir.c:sysfs_add_one() | 0 | 2 |
| WARNING:CPU:PID:at_lib/kobject.c:kobject_add_internal() | 0 | 2 |
| BUG:unable_to_handle_kernel_paging_request_at | 0 | 2 |
| Oops:SMP | 0 | 2 |
| Kernel_panic-not_syncing:Attempted_to_kill_init_exitcode= | 0 | 2 |
+------------------------------------------------------------------------------------+--------------+--------------+
[ 15.050931] CPU 0 -> Queue 0
[ 15.136602] vda: unknown partition table
[ 15.159290] ------------[ cut here ]------------
[ 15.161305] WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:526 sysfs_add_one+0x96/0xaa()
[ 15.162861] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:05.0/virtio1/block/vda/mq/0/cpu0'
[ 15.165033] Modules linked in:
[ 15.166415] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.12.0-rc5-02277-g25d8333 #1204
[ 15.167578] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.169442] 0000000000000000 ffff88001df55a10 ffffffff81a365f2 ffff88001df55a58
[ 15.171109] ffff88001df55a48 ffffffff810c5385 ffffffff81226e92 ffff88001b570000
[ 15.173115] ffff88001b59e6e0 00000000ffffffef ffff88001df55af0 ffff88001df55aa8
[ 15.174741] Call Trace:
[ 15.175550] [<ffffffff81a365f2>] dump_stack+0x54/0x74
[ 15.176965] [<ffffffff810c5385>] warn_slowpath_common+0x7f/0x98
[ 15.177852] [<ffffffff81226e92>] ? sysfs_add_one+0x96/0xaa
[ 15.178689] [<ffffffff810c53ea>] warn_slowpath_fmt+0x4c/0x4e
[ 15.179559] [<ffffffff81226e92>] sysfs_add_one+0x96/0xaa
[ 15.180860] [<ffffffff81226fd7>] create_dir+0x70/0xb2
[ 15.181677] [<ffffffff8122730c>] sysfs_create_dir+0x9a/0xb5
[ 15.182542] [<ffffffff814ff060>] kobject_add_internal+0x11a/0x20e
[ 15.183445] [<ffffffff814ff49c>] kobject_add+0x93/0xa5
[ 15.184741] [<ffffffff814e8029>] blk_mq_register_disk+0x139/0x18a
[ 15.185668] [<ffffffff814e116a>] blk_register_queue+0xc4/0x116
[ 15.186535] [<ffffffff814ea7ed>] add_disk+0x340/0x459
[ 15.187444] [<ffffffff815c1c8d>] virtblk_probe+0x4e2/0x5cc
[ 15.188947] [<ffffffff8157bcc3>] virtio_dev_probe+0xbc/0xfa
[ 15.189799] [<ffffffff815aea3a>] driver_probe_device+0x11a/0x2f2
[ 15.190708] [<ffffffff815aecb0>] __driver_attach+0x61/0x83
[ 15.191575] [<ffffffff815aec4f>] ? __device_attach+0x3d/0x3d
[ 15.193032] [<ffffffff815acc59>] bus_for_each_dev+0x80/0x8a
[ 15.194164] [<ffffffff815ae45a>] driver_attach+0x1e/0x20
[ 15.195067] [<ffffffff815adfe9>] bus_add_driver+0x131/0x265
[ 15.196206] [<ffffffff815af293>] driver_register+0x8e/0xca
[ 15.197532] [<ffffffff8157bfa6>] register_virtio_driver+0x2b/0x2d
[ 15.198452] [<ffffffff8257aaf2>] init+0x53/0x85
[ 15.199181] [<ffffffff8257aa9f>] ? max_loop_setup+0x1a/0x1a
[ 15.200569] [<ffffffff81000291>] do_one_initcall+0xa4/0x138
[ 15.201443] [<ffffffff810e1acf>] ? parse_args+0x261/0x33f
[ 15.202293] [<ffffffff82530ed3>] kernel_init_freeable+0x159/0x1df
[ 15.203207] [<ffffffff8253074d>] ? do_early_param+0x88/0x88
[ 15.204529] [<ffffffff81a26087>] ? rest_init+0xdb/0xdb
[ 15.205354] [<ffffffff81a26095>] kernel_init+0xe/0xdb
[ 15.206168] [<ffffffff81a497bc>] ret_from_fork+0x7c/0xb0
[ 15.207012] [<ffffffff81a26087>] ? rest_init+0xdb/0xdb
[ 15.208746] ---[ end trace ab3e0b29cef4bda3 ]---
[ 15.209877] ------------[ cut here ]------------
git bisect start 25d8333ad6fc71906caff0e3632231845ff585d2 61e6cfa80de5760bbe406f4e815b7739205754d2 --
git bisect bad 8c03e988073040ad2fc7906c18943873d7515d26 # 14:08 0- 15 Merge 'tip/core/rcu' into devel-hourly-2013101822
git bisect good b343ca84b4e3ba65508503333c923a797801a588 # 05:06 620+ 486 Revert "veth: Showing peer of veth type dev in ip link (kernel side)"
git bisect good e8e4e1aaf8cdacc93fc782670ed126c65b9408b8 # 10:04 620+ 461 i40e: Bump version
git bisect bad b309c3f4b6d197842fbb7d7486755e1fec5323ea # 10:04 0- 10 Merge 'block/new-queue' into devel-hourly-2013101822
git bisect good 4fd0376356ed2e1f6c2a4e8628782aedf903292e # 15:58 620+ 465 Merge branch 'renesas/boards2' into next/boards
git bisect good 33436bc028fe1a7f21a80e067321347e62a6ae6c # 05:00 620+ 550 Merge 'mac80211-next/master' into devel-hourly-2013101822
git bisect bad a96c2b583a957d84a26183ca5c763970940ed1b4 # 05:21 569- 630 blk-mq: Do not allocate more cache entries than used
git bisect bad 0ce4ee67bbd3296e5fce7c04cf13f80d2aa1b570 # 05:39 1- 9 blk-mq: cpu hot plug/unplug fixes
git bisect good 779df82640101971b7a6ea5d063e9bb24f8c1fcf # 09:58 1032+ 862 null_blk: multi queue aware block test driver
git bisect bad 3a02db083a78c9f3c9b69305ab513f9422d91b08 # 11:41 15- 8 virtio_blk: blk-mq support
git bisect good 4202782cd8b52b3e84a6a9937603334f26e43c37 # 09:06 1000+ 793 mtip32xx: basic mq support
git bisect good 4202782cd8b52b3e84a6a9937603334f26e43c37 # 12:34 3000+ 3095 mtip32xx: basic mq support
git bisect bad 25d8333ad6fc71906caff0e3632231845ff585d2 # 12:34 0- 3 Merge 'arm-soc/fixes-non-critical' into devel-hourly-2013101822
git bisect good 12aee278b50c4a94a93fa0b4d201ae35d792c696 # 09:03 3000+ 4956 Merge branch 'akpm' (fixes from Andrew Morton)
Thanks,
Fengguang
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