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Message-ID: <20181107031643.GD24195@shao2-debian>
Date: Wed, 7 Nov 2018 11:16:43 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Omar Sandoval <osandov@...com>
Cc: Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
linux-kernel@...r.kernel.org, LKP <lkp@...org>
Subject: [LKP] a9f38e1dec [ 245.678853] INFO: task mount:580 blocked for more
than 120 seconds.
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit a9f38e1dec107af70d81338332494bf0a1e76597
Author: Omar Sandoval <osandov@...com>
AuthorDate: Mon Oct 15 09:21:34 2018 -0600
Commit: Jens Axboe <axboe@...nel.dk>
CommitDate: Tue Oct 16 09:50:14 2018 -0600
floppy: convert to blk-mq
This driver likes to fetch requests from all over the place, so make
queue_rq put requests on a list so that the logic stays the same. Tested
with QEMU.
Signed-off-by: Omar Sandoval <osandov@...com>
Converted to blk_mq_init_sq_queue() and fixed a few spots where the
tag_set leaked on cleanup.
Signed-off-by: Jens Axboe <axboe@...nel.dk>
6ec3938cff ataflop: convert to blk-mq
a9f38e1dec floppy: convert to blk-mq
8053e5b93e Merge tag 'trace-v4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
337734cbca Add linux-next specific files for 20181106
+---------------------------------------------------------+------------+------------+------------+---------------+
| | 6ec3938cff | a9f38e1dec | 8053e5b93e | next-20181106 |
+---------------------------------------------------------+------------+------------+------------+---------------+
| boot_successes | 251 | 68 | 69 | 74 |
| boot_failures | 48 | 27 | 25 | 23 |
| Mem-Info | 48 | 12 | 15 | 7 |
| invoked_oom-killer:gfp_mask=0x | 6 | 4 | 3 | 2 |
| EIP:iov_iter_fault_in_readable | 4 | 1 | | |
| Out_of_memory:Kill_process | 3 | 2 | 2 | |
| Out_of_memory_and_no_killable_processes | 3 | 2 | 2 | |
| Kernel_panic-not_syncing:System_is_deadlocked_on_memory | 3 | 2 | 2 | |
| EIP:__put_user_4 | 1 | | | |
| INFO:task_blocked_for_more_than#seconds | 0 | 15 | 10 | 16 |
| EIP:lock_is_held_type | 0 | 1 | 0 | 1 |
| EIP:native_safe_halt | 0 | 3 | | |
| Kernel_panic-not_syncing:hung_task:blocked_tasks | 0 | 15 | 10 | 16 |
| EIP:strnlen_user | 0 | 1 | | |
| EIP:_local_bh_enable | 0 | 1 | | |
| EIP:__lock_acquire | 0 | 1 | 1 | 1 |
| EIP:vprintk_emit | 0 | 1 | | |
| EIP:do_softirq_own_stack | 0 | 0 | 1 | |
| EIP:default_idle | 0 | 0 | 2 | 1 |
| EIP:reschedule_interrupt | 0 | 0 | 1 | |
| EIP:delay_tsc | 0 | 0 | 0 | 1 |
| EIP:copy_page_from_iter | 0 | 0 | 0 | 1 |
| EIP:_cond_resched | 0 | 0 | 0 | 1 |
+---------------------------------------------------------+------------+------------+------------+---------------+
[ 244.196551] random: get_random_u32 called from arch_align_stack+0x2d/0x40 with crng_init=1
[ 245.254485] _warn_unseeded_randomness: 54 callbacks suppressed
[ 245.254491] random: get_random_u32 called from copy_process+0x1c8/0x17b0 with crng_init=1
[ 245.257366] random: get_random_u32 called from arch_pick_mmap_layout+0x110/0x140 with crng_init=1
[ 245.258675] random: get_random_u32 called from load_elf_binary+0x2b6/0xb48 with crng_init=1
[ 245.678853] INFO: task mount:580 blocked for more than 120 seconds.
[ 245.679906] Tainted: G T 4.19.0-rc6-00172-ga9f38e1 #1
[ 245.680959] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 245.682181] mount D 6372 580 1 0x00000004
[ 245.683023] Call Trace:
[ 245.683425] __schedule+0x2df/0x570
[ 245.683975] schedule+0x2d/0x80
[ 245.684476] schedule_timeout+0x19d/0x330
[ 245.685090] ? wait_for_common+0xa5/0x170
[ 245.685735] wait_for_common+0xac/0x170
[ 245.686339] ? do_sched_yield+0x90/0x90
[ 245.686935] wait_for_completion+0x12/0x20
[ 245.687571] __floppy_read_block_0+0xfb/0x150
[ 245.688244] ? floppy_resume+0x40/0x40
[ 245.688844] floppy_revalidate+0x20f/0x240
[ 245.689486] check_disk_change+0x43/0x60
[ 245.690087] floppy_open+0x1ea/0x360
[ 245.690653] __blkdev_get+0xb4/0x4d0
[ 245.691212] ? blkdev_get+0x1db/0x370
[ 245.691777] blkdev_get+0x1f3/0x370
[ 245.692351] ? path_put+0x15/0x20
[ 245.692871] ? lookup_bdev+0x4b/0x90
[ 245.693539] blkdev_get_by_path+0x3d/0x80
[ 245.694165] mount_bdev+0x2a/0x190
[ 245.694695] squashfs_mount+0x10/0x20
[ 245.695271] ? squashfs_alloc_inode+0x30/0x30
[ 245.695960] mount_fs+0xf/0x90
[ 245.696451] vfs_kern_mount+0x43/0x130
[ 245.697036] do_mount+0x187/0xc40
[ 245.697563] ? memdup_user+0x28/0x50
[ 245.698124] ksys_mount+0x60/0xc0
[ 245.698639] sys_mount+0x19/0x20
[ 245.699167] do_int80_syscall_32+0x61/0x130
[ 245.699813] entry_INT80_32+0xc7/0xc7
[ 245.700391] EIP: 0x47f46fee
[ 245.700829] Code: 11 83 c8 ff eb e2 90 90 90 90 90 90 57 56 53 8b 7c 24 20 8b 74 24 1c 8b 54 24 18 8b 4c 24 14 8b 5c 24 10 b8 15 00 00 00 cd 80 <5b> 5e 5f 3d 01 f0 ff ff 73 01 c3 e8 e8 80 03 00 81 c1 f6 5f 09 00
[ 245.703680] EAX: ffffffda EBX: affa4efa ECX: affa4f03 EDX: 080d3630
[ 245.704642] ESI: 00008010 EDI: 00000000 EBP: 00000000 ESP: affa45c0
[ 245.705637] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000282
[ 245.706679]
[ 245.706679] Showing all locks held in the system:
[ 245.707636] 1 lock held by khungtaskd/22:
[ 245.708258] #0: (ptrval) (rcu_read_lock){....}, at: debug_show_all_locks+0x13/0x110
[ 245.709474] 3 locks held by mount/580:
[ 245.710056] #0: (ptrval) (&bdev->bd_mutex){....}, at: __blkdev_get+0x136/0x4d0
[ 245.711186] #1: (ptrval) (floppy_mutex){....}, at: floppy_open+0x26/0x360
[ 245.712265] #2: (ptrval) (open_lock){....}, at: floppy_open+0x32/0x360
[ 245.713289]
[ 245.713539] =============================================
[ 245.713539]
[ 245.714587] NMI backtrace for cpu 0
[ 245.715132] CPU: 0 PID: 22 Comm: khungtaskd Tainted: G T 4.19.0-rc6-00172-ga9f38e1 #1
[ 245.716507] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 245.717763] Call Trace:
[ 245.718153] dump_stack+0x79/0xa6
[ 245.718663] nmi_cpu_backtrace+0x8c/0x90
[ 245.719269] nmi_trigger_cpumask_backtrace+0xaa/0xe0
[ 245.720019] ? irq_force_complete_move+0x80/0x80
[ 245.720731] arch_trigger_cpumask_backtrace+0x13/0x20
[ 245.721504] watchdog+0x2d9/0x3f0
[ 245.722010] kthread+0xdb/0x110
[ 245.722499] ? hung_task_panic+0x20/0x20
[ 245.723093] ? __kthread_create_on_node+0x140/0x140
[ 245.723842] ret_from_fork+0x19/0x30
[ 245.724419] Sending NMI from CPU 0 to CPUs 1:
[ 245.725109] NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x5/0x10
[ 245.726094] Kernel panic - not syncing: hung_task: blocked tasks
[ 245.727154] CPU: 0 PID: 22 Comm: khungtaskd Tainted: G T 4.19.0-rc6-00172-ga9f38e1 #1
[ 245.728537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 245.729790] Call Trace:
[ 245.730185] dump_stack+0x79/0xa6
[ 245.730693] panic+0x98/0x1d0
[ 245.731166] watchdog+0x2e3/0x3f0
[ 245.731672] kthread+0xdb/0x110
[ 245.732158] ? hung_task_panic+0x20/0x20
[ 245.732755] ? __kthread_create_on_node+0x140/0x140
[ 245.733504] ret_from_fork+0x19/0x30
[ 245.734093] Kernel Offset: 0x5a00000 from 0xb1000000 (relocation range: 0xb0000000-0xc07d1fff)
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 384a8a0d3699415091a01a3c7e7d40fe232bc32f 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d --
git bisect bad 08b6b9a0ecf1807ed20f24a3dd1284d707563ad1 # 22:15 B 29 2 20 20 Merge 'linux-review/robbieko/Btrfs-fix-cur_offset-in-the-error-case-for-nocow/20181030-181552' into devel-catchup-201810311741
git bisect bad bb451bbc477cc8aa24b61bcc50db56b126838e4b # 22:41 B 17 2 9 9 Merge 'tip/master' into devel-catchup-201810311741
git bisect bad f4e4b76f16e81d604c111e0fe740434fda6cfd08 # 22:57 B 21 1 8 8 Merge 'linux-review/Yuantian-Tang/clk-qoriq-add-more-chips-support/20181031-170545' into devel-catchup-201810311741
git bisect bad e7248e5b707330ae6d6e4c45061a74faf428faa7 # 23:19 B 22 1 15 16 Merge 'jpirko-mlxsw/net_queue' into devel-catchup-201810311741
git bisect good 1e68fdfc37c7dc0e53a5ff23888c6f7284d53511 # 23:57 G 157 0 97 97 0day base guard for 'devel-catchup-201810311741'
git bisect bad 62606c224d72a98c35d21a849f95cccf95b0a252 # 00:17 B 18 1 12 13 Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
git bisect good 3f80e08f40cdb308589a49077c87632fa4508b21 # 00:58 G 161 0 96 96 tcp: add tcp_reset_xmit_timer() helper
git bisect bad 382d72a9aa525b56ab8453ce61751fa712414d3d # 01:12 B 33 2 18 19 Merge branch 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad b0b6a28bc4b265aa56cbf4fa8fd27c0a4fa3a49c # 01:29 B 13 1 7 7 Merge tag 'pinctrl-v4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
git bisect bad a36cf6865120d7534fcb132d311f03e5159f2da7 # 01:45 B 5 1 4 4 Merge tag 'mtd/for-4.20' of git://git.infradead.org/linux-mtd
git bisect bad 52990a5fb0c991ecafebdab43138b5ed41376852 # 02:00 B 12 1 6 6 block: setup bounce bio_sets properly
git bisect good ae14cc044b5988148d819c377fd0cc1c7504bc3c # 03:29 G 155 0 90 90 lightnvm: pblk: refactor put line fn on read completion
git bisect good 9316a9ed6895c4ad2f0cde171d486f80c55d8283 # 04:11 G 157 0 86 86 blk-mq: provide helper for setting up an SQ queue and tag set
git bisect bad bb2a1d4e804aa41eef0003a192a674f844dbca23 # 04:26 B 31 1 19 19 nvme-core: rework a NQN copying operation
git bisect good 21b07f35544af5e2c11f079057e8fb4263d35dd3 # 05:20 G 159 0 92 92 amiflop: convert to blk-mq
git bisect bad 8535fd6f702a4b3e225258a86dcbf5dd93b73d51 # 05:41 B 38 1 19 19 z2ram: convert to blk-mq
git bisect good 6ec3938cff95fe792a05fdf4ba14f92977e5e31d # 06:40 G 174 0 106 106 ataflop: convert to blk-mq
git bisect bad ad5fc6bb72214615f300af1f4ed57f71bc3be510 # 07:02 B 25 2 16 17 gdrom: convert to blk-mq
git bisect bad a9f38e1dec107af70d81338332494bf0a1e76597 # 07:27 B 31 1 21 21 floppy: convert to blk-mq
# first bad commit: [a9f38e1dec107af70d81338332494bf0a1e76597] floppy: convert to blk-mq
git bisect good 6ec3938cff95fe792a05fdf4ba14f92977e5e31d # 08:44 G 498 0 250 357 ataflop: convert to blk-mq
# extra tests with debug options
git bisect bad a9f38e1dec107af70d81338332494bf0a1e76597 # 09:00 B 30 2 14 15 floppy: convert to blk-mq
# extra tests on HEAD of linux-devel/devel-catchup-201810311741
git bisect bad 384a8a0d3699415091a01a3c7e7d40fe232bc32f # 09:01 B 136 24 0 194 0day head guard for 'devel-catchup-201810311741'
# extra tests on tree/branch linus/master
git bisect bad 8053e5b93eca9b011f7b79bb019bf1eeaaf96c4b # 09:28 B 37 1 19 19 Merge tag 'trace-v4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
# extra tests with first bad commit reverted
git bisect good e63db4a6aaac124f2fd7700827d4f2566d80d01e # 10:17 G 202 0 119 119 Revert "floppy: convert to blk-mq"
# extra tests on tree/branch linux-next/master
git bisect bad 337734cbca7453b1d57049bda1b9879adde2a5f8 # 10:41 B 17 1 11 12 Add linux-next specific files for 20181106
---
0-DAY kernel test infrastructure Open Source Technology Center
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