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Message-ID: <20121105070106.GA17015@localhost>
Date: Mon, 5 Nov 2012 15:01:06 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
Cc: Vivek Goyal <vgoyal@...hat.com>,
Ben Hutchings <ben@...adent.org.uk>,
Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>,
Jiri Kosina <jkosina@...e.cz>, Jens Axboe <axboe@...nel.dk>,
LKML <linux-kernel@...r.kernel.org>
Subject: [floppy, blk_peek_request] BUG: scheduling while atomic:
kworker/u:0/6/0x10000002
Hi Herton,
I got the below oops in Linux 3.7-rc4 and it's bisected down to
commit b54e1f88897bcacc2cd359f48ea3b39eaf55f084
Author: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
Date: Mon Aug 27 20:56:51 2012 -0300
floppy: don't call alloc_ordered_workqueue inside the alloc_disk loop
[ 14.108013] CPU 0
[ 14.108013] Pid: 6, comm: kworker/u:0 Not tainted 3.7.0-rc4 #1 Bochs Bochs
[ 14.108013] RIP: 0010:[<ffffffff8134eef5>] [<ffffffff8134eef5>] blk_peek_request+0xd5/0x1c0
[ 14.108013] RSP: 0000:ffff88000dc7dd88 EFLAGS: 00010092
[ 14.108013] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
[ 14.108013] RDX: ffff88000f602688 RSI: ffffffff81fd95d8 RDI: 6b6b6b6b6b6b6b6b
[ 14.108013] RBP: ffff88000dc7dd98 R08: ffffffff81fd95c8 R09: 0000000000000000
[ 14.108013] R10: ffffffff81fd9480 R11: 0000000000000001 R12: 6b6b6b6b6b6b6b6b
[ 14.108013] R13: ffff88000dc7dfd8 R14: ffff88000dc7dfd8 R15: 0000000000000000
[ 14.108013] FS: 0000000000000000(0000) GS:ffffffff81e21000(0000) knlGS:0000000000000000
[ 14.108013] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 14.108013] CR2: 0000000000000000 CR3: 0000000001e11000 CR4: 00000000000006f0
[ 14.108013] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 14.108013] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 14.108013] Process kworker/u:0 (pid: 6, threadinfo ffff88000dc7c000, task ffff88000dc5ecc0)
[ 14.108013] Stack:
[ 14.108013] 0000000000000000 0000000000000000 ffff88000dc7ddb8 ffffffff8134efee
[ 14.108013] ffff88000dc7ddb8 0000000000000000 ffff88000dc7dde8 ffffffff814aef3c
[ 14.108013] ffffffff81e75d80 ffff88000dc0c640 ffff88000fbfb000 ffffffff814aed90
[ 14.108013] Call Trace:
[ 14.108013] [<ffffffff8134efee>] blk_fetch_request+0xe/0x30
[ 14.108013] [<ffffffff814aef3c>] redo_fd_request+0x1ac/0x400
[ 14.108013] [<ffffffff814aed90>] ? start_motor+0x130/0x130
[ 14.108013] [<ffffffff8106b526>] process_one_work+0x136/0x450
[ 14.108013] [<ffffffff8106af65>] ? manage_workers+0x205/0x2e0
[ 14.108013] [<ffffffff8106bb6d>] worker_thread+0x14d/0x420
[ 14.108013] [<ffffffff8106ba20>] ? rescuer_thread+0x1a0/0x1a0
[ 14.108013] [<ffffffff8107075a>] kthread+0xba/0xc0
[ 14.108013] [<ffffffff810706a0>] ? __kthread_parkme+0x80/0x80
[ 14.108013] [<ffffffff818b553a>] ret_from_fork+0x7a/0xb0
[ 14.108013] [<ffffffff810706a0>] ? __kthread_parkme+0x80/0x80
[ 14.108013] Code: 0f 84 c0 00 00 00 83 f8 01 0f 85 e2 00 00 00 81 4b 40 00 00 80 00 48 89 df e8 58 f8 ff ff be fb ff ff ff 48 89 df e8 fb fe ff ff <49> 8b 1c 24 49 39 dc 0f 85 2e ff ff ff 41 0f b6 84 24 28 04 00
[ 14.108013] RIP [<ffffffff8134eef5>] blk_peek_request+0xd5/0x1c0
[ 14.108013] RSP <ffff88000dc7dd88>
Thanks,
Fengguang
View attachment "dmesg-kvm-inn-50500-2012-11-05-03-35-21-3.7.0-rc4-1" of type "text/plain" (30772 bytes)
View attachment "config-3.7.0-rc4" of type "text/plain" (65734 bytes)
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