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Date: Sun, 28 May 2017 13:33:25 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Bart Van Assche <bart.vanassche@...disk.com>
Cc: Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.com>,
Omar Sandoval <osandov@...com>, Ming Lei <ming.lei@...hat.com>,
LKML <linux-kernel@...r.kernel.org>,
Bart Van Assche <bart.vanassche@...disk.com>, lkp@...org
Subject: [lkp-robot] [block] c4e7d723f3:
WARNING:at_block/blk-merge.c:#attempt_merge
FYI, we noticed the following commit:
commit: c4e7d723f3a1823e5cc6d1a2b4611c2561b504fc ("block: Check locking assumptions at runtime")
https://github.com/bvanassche/linux for-next
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -smp 2 -m 512M
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+---------------------------------------------+------------+------------+
| | 1f601b31df | c4e7d723f3 |
+---------------------------------------------+------------+------------+
| boot_successes | 41 | 4 |
| boot_failures | 0 | 4 |
| WARNING:at_block/blk-merge.c:#attempt_merge | 0 | 4 |
+---------------------------------------------+------------+------------+
[ 207.874416] WARNING: CPU: 0 PID: 419 at block/blk-merge.c:674 attempt_merge+0xd1/0x11a6
[ 207.874416] WARNING: CPU: 0 PID: 419 at block/blk-merge.c:674 attempt_merge+0xd1/0x11a6
[ 207.879165] CPU: 0 PID: 419 Comm: blkid Not tainted 4.12.0-rc2-00189-gc4e7d723 #1
[ 207.879165] CPU: 0 PID: 419 Comm: blkid Not tainted 4.12.0-rc2-00189-gc4e7d723 #1
[ 207.882794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 207.882794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 207.887696] task: ffff88001ecfc4c0 task.stack: ffffc9000053c000
[ 207.887696] task: ffff88001ecfc4c0 task.stack: ffffc9000053c000
[ 207.890582] RIP: 0010:attempt_merge+0xd1/0x11a6
[ 207.890582] RIP: 0010:attempt_merge+0xd1/0x11a6
[ 207.892811] RSP: 0018:ffffc9000053f8e8 EFLAGS: 00010296
[ 207.892811] RSP: 0018:ffffc9000053f8e8 EFLAGS: 00010296
[ 207.895393] RAX: ffff88001ecfc4c0 RBX: ffff880013fde008 RCX: ffffc9000053fb20
[ 207.895393] RAX: ffff88001ecfc4c0 RBX: ffff880013fde008 RCX: ffffc9000053fb20
[ 207.898764] RDX: 00000000ffffffff RSI: ffff880013fde2b0 RDI: 0000000000000246
[ 207.898764] RDX: 00000000ffffffff RSI: ffff880013fde2b0 RDI: 0000000000000246
[ 207.902212] RBP: ffffc9000053f9b0 R08: ffff880014271a90 R09: 0000000000000000
[ 207.902212] RBP: ffffc9000053f9b0 R08: ffff880014271a90 R09: 0000000000000000
[ 207.905666] R10: ffffc9000053f9c0 R11: ffff880014271af8 R12: ffff880013a9b400
[ 207.905666] R10: ffffc9000053f9c0 R11: ffff880014271af8 R12: ffff880013a9b400
[ 207.909127] R13: ffff880013a9b600 R14: ffff88001427dc00 R15: ffff880013fde008
[ 207.909127] R13: ffff880013a9b600 R14: ffff88001427dc00 R15: ffff880013fde008
[ 207.912703] FS: 00007f33d86a3740(0000) GS:ffffffff8363e000(0000) knlGS:0000000000000000
[ 207.912703] FS: 00007f33d86a3740(0000) GS:ffffffff8363e000(0000) knlGS:0000000000000000
[ 207.916620] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 207.916620] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 207.919447] CR2: 000000000211f1d8 CR3: 000000001ee60000 CR4: 00000000000006f0
[ 207.919447] CR2: 000000000211f1d8 CR3: 000000001ee60000 CR4: 00000000000006f0
[ 207.922919] Call Trace:
[ 207.922919] Call Trace:
[ 207.924163] ? kvm_clock_read+0x16/0x1e
[ 207.924163] ? kvm_clock_read+0x16/0x1e
[ 207.926065] blk_attempt_req_merge+0x3f/0x98
[ 207.926065] blk_attempt_req_merge+0x3f/0x98
[ 207.928171] elv_attempt_insert_merge+0x63/0xb4
[ 207.928171] elv_attempt_insert_merge+0x63/0xb4
[ 207.930407] blk_mq_sched_try_insert_merge+0x74/0x8e
[ 207.930407] blk_mq_sched_try_insert_merge+0x74/0x8e
[ 207.932846] dd_insert_requests+0xb0/0x261
[ 207.932846] dd_insert_requests+0xb0/0x261
[ 207.934869] ? dd_merged_requests+0xbe/0xbe
[ 207.934869] ? dd_merged_requests+0xbe/0xbe
[ 207.936936] blk_mq_sched_insert_requests+0x131/0x133
[ 207.936936] blk_mq_sched_insert_requests+0x131/0x133
[ 207.939417] blk_mq_flush_plug_list+0x30e/0x3dd
[ 207.939417] blk_mq_flush_plug_list+0x30e/0x3dd
[ 207.941654] blk_flush_plug_list+0x10f/0x2f5
[ 207.941654] blk_flush_plug_list+0x10f/0x2f5
[ 207.943761] blk_finish_plug+0x35/0x4b
[ 207.943761] blk_finish_plug+0x35/0x4b
[ 207.945629] ? blkdev_write_begin+0x4c/0x4c
[ 207.945629] ? blkdev_write_begin+0x4c/0x4c
[ 207.947700] __do_page_cache_readahead+0x3e2/0x445
[ 207.947700] __do_page_cache_readahead+0x3e2/0x445
[ 207.950048] ondemand_readahead+0x4e8/0x506
[ 207.950048] ondemand_readahead+0x4e8/0x506
[ 207.952119] ? ondemand_readahead+0x4e8/0x506
[ 207.952119] ? ondemand_readahead+0x4e8/0x506
[ 207.954270] page_cache_async_readahead+0xff/0x14e
[ 207.954270] page_cache_async_readahead+0xff/0x14e
[ 207.956627] generic_file_read_iter+0x336/0xb38
[ 207.956627] generic_file_read_iter+0x336/0xb38
[ 207.958864] blkdev_read_iter+0x61/0x78
[ 207.958864] blkdev_read_iter+0x61/0x78
[ 207.960855] __vfs_read+0x149/0x19d
[ 207.960855] __vfs_read+0x149/0x19d
[ 207.962878] vfs_read+0xda/0x1a1
[ 207.962878] vfs_read+0xda/0x1a1
[ 207.964501] SyS_read+0x5a/0xc3
[ 207.964501] SyS_read+0x5a/0xc3
[ 207.966084] entry_SYSCALL_64_fastpath+0x23/0xc1
[ 207.966084] entry_SYSCALL_64_fastpath+0x23/0xc1
[ 207.968371] RIP: 0033:0x7f33d7f8b0a0
[ 207.968371] RIP: 0033:0x7f33d7f8b0a0
[ 207.970326] RSP: 002b:00007ffe6bbbd3f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[ 207.970326] RSP: 002b:00007ffe6bbbd3f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[ 207.974007] RAX: ffffffffffffffda RBX: 00007f33d825c720 RCX: 00007f33d7f8b0a0
[ 207.974007] RAX: ffffffffffffffda RBX: 00007f33d825c720 RCX: 00007f33d7f8b0a0
[ 207.977488] RDX: 0000000000000200 RSI: 000000000211f9d8 RDI: 0000000000000003
[ 207.977488] RDX: 0000000000000200 RSI: 000000000211f9d8 RDI: 0000000000000003
[ 207.980963] RBP: 00000000000005a1 R08: 0000000000000028 R09: 0000000000200000
[ 207.980963] RBP: 00000000000005a1 R08: 0000000000000028 R09: 0000000000200000
[ 207.984431] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f33d825c778
[ 207.984431] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f33d825c778
[ 207.987900] R13: 0000000000000589 R14: 000000000211ec30 R15: 0000000000018e31
[ 207.987900] R13: 0000000000000589 R14: 000000000211ec30 R15: 0000000000018e31
[ 207.991363] Code: ff f7 45 a8 00 40 06 00 0f 85 db 10 00 00 e8 ac 82 c5 ff 48 8b 45 c8 f7 40 48 1a 00 04 00 0f 85 c5 10 00 00 eb 09 e8 94 82 c5 ff <0f> ff eb 82 e8 8b 82 c5 ff 48 8b 45 d0 44 8b 60 44 45 0f b6 ec
[ 207.991363] Code: ff f7 45 a8 00 40 06 00 0f 85 db 10 00 00 e8 ac 82 c5 ff 48 8b 45 c8 f7 40 48 1a 00 04 00 0f 85 c5 10 00 00 eb 09 e8 94 82 c5 ff <0f> ff eb 82 e8 8b 82 c5 ff 48 8b 45 d0 44 8b 60 44 45 0f b6 ec
[ 208.000626] ---[ end trace 3746e1136bcc217e ]---
To reproduce:
git clone https://github.com/01org/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
View attachment "config-4.12.0-rc2-00189-gc4e7d723" of type "text/plain" (131138 bytes)
Download attachment "dmesg.xz" of type "application/octet-stream" (29864 bytes)
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