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Message-ID: <20190117103553.GB23565@ming.t460p>
Date: Thu, 17 Jan 2019 18:35:55 +0800
From: Ming Lei <ming.lei@...hat.com>
To: Guenter Roeck <linux@...ck-us.net>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>,
Linux Next Mailing List <linux-next@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Christoph Hellwig <hch@....de>, Omar Sandoval <osandov@...com>,
Jens Axboe <axboe@...nel.dk>
Subject: Re: linux-next: Tree for Jan 16
On Thu, Jan 17, 2019 at 04:49:03PM +0800, Ming Lei wrote:
> On Wed, Jan 16, 2019 at 12:35:47PM -0800, Guenter Roeck wrote:
> > On Wed, Jan 16, 2019 at 05:38:38PM +1100, Stephen Rothwell wrote:
> > > Hi all,
> > >
> > > Changes since 20190115:
> > >
> > > The vfs tree still had its build failure for which I applied a patch.
> > >
> > > The drm-misc tree gained conflicts against the drm-intel tree.
> > >
> > > The mali-dp tree still had its failure for which I applied a merge
> > > fix patch.
> > >
> > > The block tree gained a conflict against the fscrypt tree and build
> > > failures for which I applied 2 merge fix patches and a fix patch.
> > >
> > > Non-merge commits (relative to Linus' tree): 1975
> > > 2069 files changed, 67760 insertions(+), 30784 deletions(-)
> > >
> >
> > Time for a damage report.
> >
> > Build results:
> > total: 159 pass: 148 fail: 11
> > Failed builds:
> > alpha:allmodconfig
> > ia64:defconfig
> > ia64:allnoconfig
> > ia64:tinyconfig
> > powerpc:ppc6xx_defconfig
> > sh:defconfig
> > sh:allnoconfig
> > sh:tinyconfig
> > sh:dreamcast_defconfig
> > sh:microdev_defconfig
> > sh:shx3_defconfig
> > Qemu test results:
> > total: 343 pass: 230 fail: 113
> > [details dropped]
> >
> > I won't address the build failures; I assume the culprits know through
> > 0day. See https://kerneltests.org/builders/ for details and logs.
> >
> > The main culprit of the qemu test failures is a block subsystem commit.
> > bisect log and bisected backtrace below. It may well be that there are
> > other failures in that subsystem - backtraces are not always the same.
> > Affected architectures are arm, mips, ppc, parisc, sparc, and x86.
> > sh4 may be affected as well, but all sh4 images fail to build and can
> > not be tested at this time.
> >
> > Also, I suspect that the observed crashes may hide other failures -
> > I had seen some boot stalls in next-20190115 (not bisected).
> >
> > Guenter
> >
> > ---
> > # bad: [cbeb3db684f72d744e74c567542faac796d9cbd8] Add linux-next specific files for 20190116
> > # good: [1c7fc5cbc33980acd13d668f1c8f0313d6ae9fd8] Linux 5.0-rc2
> > git bisect start 'HEAD' 'v5.0-rc2'
> > # good: [11822c837bf744c38fab8370899338884d30f30b] Merge remote-tracking branch 'nfc-next/master'
> > git bisect good 11822c837bf744c38fab8370899338884d30f30b
> > # bad: [8c4aa656d7befa3ca3c5c2856eeabc30317d9775] Merge remote-tracking branch 'apparmor/apparmor-next'
> > git bisect bad 8c4aa656d7befa3ca3c5c2856eeabc30317d9775
> > # good: [2465c219c523ed47f2adae88805d3bb68fbc51c0] Merge remote-tracking branch 'drm-misc/for-linux-next'
> > git bisect good 2465c219c523ed47f2adae88805d3bb68fbc51c0
> > # good: [afa8e20f9d4d5aacf9158b7be36ec81ec499aa5c] Merge remote-tracking branch 'sound-asoc/for-next'
> > git bisect good afa8e20f9d4d5aacf9158b7be36ec81ec499aa5c
> > # bad: [ae563d4fc73ad2cfd1408e72fd3aa67c4f5c9c8d] Merge remote-tracking branch 'kgdb/kgdb-next'
> > git bisect bad ae563d4fc73ad2cfd1408e72fd3aa67c4f5c9c8d
> > # bad: [6cb6b5a89b70120f840f37e94ee10f9b8ffdabd9] Merge remote-tracking branch 'block/for-next'
> > git bisect bad 6cb6b5a89b70120f840f37e94ee10f9b8ffdabd9
> > # bad: [93670fad03e97d5526b23fe67a3fe2be52e21732] block: kill QUEUE_FLAG_NO_SG_MERGE
> > git bisect bad 93670fad03e97d5526b23fe67a3fe2be52e21732
> > # bad: [beab05e0114623255b4d5cd3776df6da26be42b0] block: introduce bvec_last_segment()
> > git bisect bad beab05e0114623255b4d5cd3776df6da26be42b0
> > # good: [f3effe4c1240a36a487ba1ff134478236a69b32d] block: rename bvec helpers
> > git bisect good f3effe4c1240a36a487ba1ff134478236a69b32d
> > # good: [cad1e6bb0ecfebbb3168ebc46dcf5e39f7bf2268] block: introduce bio_for_each_bvec() and rq_for_each_bvec()
> > git bisect good cad1e6bb0ecfebbb3168ebc46dcf5e39f7bf2268
> > # bad: [73f4209ccda9cf3d403692517bc90d5431c1ef2d] block: use bio_for_each_bvec() to map sg
> > git bisect bad 73f4209ccda9cf3d403692517bc90d5431c1ef2d
> > # bad: [258cfdfaf7bd729e759a0a91fd00ac9794796ad3] block: use bio_for_each_bvec() to compute multi-page bvec count
> > git bisect bad 258cfdfaf7bd729e759a0a91fd00ac9794796ad3
> > # first bad commit: [258cfdfaf7bd729e759a0a91fd00ac9794796ad3] block: use bio_for_each_bvec() to compute multi-page bvec count
> >
> > --
> > Bisected backtrace:
> >
> > [ 24.745267] BUG: unable to handle kernel paging request at 0959bd38
> > [ 24.745267] #PF error: [normal kernel read fault]
> > [ 24.745267] *pde = 00000000
> > [ 24.745267] Oops: 0000 [#1] SMP
> > [ 24.745267] CPU: 0 PID: 7 Comm: kworker/u2:0 Not tainted 5.0.0-rc2-next-20190116 #1
> > [ 24.745267] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org 04/01/2014
> > [ 24.745267] Workqueue: events_unbound async_run_entry_fn
> > [ 24.745267] EIP: blk_rq_map_sg+0x1cd/0x510
> > [ 24.745267] Code: e8 a8 f2 01 00 8b 5d d0 8b 75 e8 89 f9 03 75 cc 89 f2 f7 d2
> > 23 93 54 03 00 00 83 c2 01 39 bb 6c 03 00 00 0f 46 8b 6c 03 00 00 <8b> 18 39 ca
> > 0f 47 d1 89 f1 c1 ee 0c 83 e3 03 81 e1 ff 0f 00 00 89
> > [ 24.745267] EAX: 0959bd38 EBX: cfbfb500 ECX: 000000ff EDX: 00000000
> > [ 24.745267] ESI: 00000000 EDI: 000000ff EBP: cf8b3bd8 ESP: cf8b3b94
> > [ 24.745267] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00200212
> > [ 24.745267] CR0: 80050033 CR2: 0959bd38 CR3: 09e72000 CR4: 003406d0
> > [ 24.745267] Call Trace:
> > [ 24.745267] scsi_init_sgtable+0x30/0x70
> > [ 24.745267] scsi_init_io+0x2a/0x80
> > [ 24.745267] scsi_queue_rq+0x64e/0xa50
> > [ 24.745267] blk_mq_dispatch_rq_list+0x318/0x4c0
> > [ 24.745267] blk_mq_do_dispatch_sched+0x6d/0xf0
> > [ 24.745267] blk_mq_sched_dispatch_requests+0xee/0x150
> > [ 24.745267] __blk_mq_run_hw_queue+0x59/0xd0
> > [ 24.745267] __blk_mq_delay_run_hw_queue+0x177/0x1a0
> > [ 24.745267] blk_mq_run_hw_queue+0x72/0xc0
> > [ 24.745267] ? dd_merged_requests+0xb0/0xb0
> > [ 24.745267] blk_mq_sched_insert_request+0x103/0x190
> > [ 24.745267] blk_execute_rq_nowait+0x3c/0x50
> > [ 24.745267] blk_execute_rq+0x52/0x80
> > [ 24.745267] ? blk_execute_rq_nowait+0x50/0x50
> > [ 24.745267] __scsi_execute+0xd9/0x1d0
> > [ 24.745267] scsi_vpd_inquiry+0x62/0xb0
> > [ 24.745267] ? regcache_read+0x12f/0x160
> > [ 24.745267] scsi_get_vpd_buf+0x2f/0x90
> > [ 24.745267] scsi_attach_vpd+0x32/0xc0
> > [ 24.745267] scsi_probe_and_add_lun+0xa6e/0xb70
> > [ 24.745267] ? __pm_runtime_resume+0x4f/0x90
> > [ 24.745267] __scsi_add_device+0x103/0x120
> > [ 24.745267] ata_scsi_scan_host+0x8e/0x1b0
> > [ 24.745267] async_port_probe+0x3b/0x4b
> > [ 24.745267] ? ata_port_probe+0x30/0x30
> > [ 24.745267] async_run_entry_fn+0x35/0xf0
> > [ 24.745267] process_one_work+0x1e4/0x530
> > [ 24.745267] worker_thread+0x39/0x3d0
> > [ 24.745267] kthread+0xf2/0x110
> > [ 24.745267] ? drain_workqueue+0x170/0x170
> > [ 24.745267] ? kthread_park+0x90/0x90
> > [ 24.745267] ret_from_fork+0x2e/0x38
> > [ 24.745267] Modules linked in:
> > [ 24.745267] CR2: 000000000959bd38
> > [ 24.745267] ---[ end trace 3e516846ce7ccae9 ]---
> > [ 24.745267] EIP: blk_rq_map_sg+0x1cd/0x510
> > [ 24.745267] Code: e8 a8 f2 01 00 8b 5d d0 8b 75 e8 89 f9 03 75 cc 89 f2 f7 d2
> > 23 93 54 03 00 00 83 c2 01 39 bb 6c 03 00 00 0f 46 8b 6c 03 00 00 <8b> 18 39 ca
> > 0f 47 d1 89 f1 c1 ee 0c 83 e3 03 81 e1 ff 0f 00 00 89
> > [ 24.745267] EAX: 0959bd38 EBX: cfbfb500 ECX: 000000ff EDX: 00000000
> > [ 24.745267] ESI: 00000000 EDI: 000000ff EBP: cf8b3bd8 ESP: c9e7649c
> > [ 24.745267] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00200212
> > [ 24.745267] CR0: 80050033 CR2: 0959bd38 CR3: 09e72000 CR4: 003406d0
> > [ 24.745267] BUG: sleeping function called from invalid context at include/linux/percpu-rwsem.h:34
> > [ 24.745267] in_atomic(): 1, irqs_disabled(): 1, pid: 7, name: kworker/u2:0
> > [ 24.745267] INFO: lockdep is turned off.
> > [ 24.745267] irq event stamp: 49332
> > [ 24.745267] hardirqs last enabled at (49331): [<c8c0176a>] trace_hardirqs_on_thunk+0xc/0x10
> > [ 24.745267] hardirqs last disabled at (49332): [<c8c0177a>] trace_hardirqs_off_thunk+0xc/0x12
> > [ 24.745267] softirqs last enabled at (49330): [<c983dba2>] __do_softirq+0x2c2/0x3d7
> > [ 24.745267] softirqs last disabled at (49323): [<c8c1d090>] call_on_stack+0x40/0x50
> > [ 24.745267] CPU: 0 PID: 7 Comm: kworker/u2:0 Tainted: G D 5.0.0-rc2-next-20190116 #1
> > [ 24.745267] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
> > rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org 04/01/2014
> > [ 24.745267] Workqueue: events_unbound async_run_entry_fn
> > [ 24.745267] Call Trace:
> > [ 24.745267] dump_stack+0x66/0x8e
> > [ 24.745267] ___might_sleep.cold.85+0x8e/0x9f
> > [ 24.745267] __might_sleep+0x2e/0x80
> > [ 24.745267] exit_signals+0x25/0x220
> > [ 24.745267] do_exit+0x89/0xb80
> > [ 24.745267] ? kthread+0xf2/0x110
> > [ 24.745267] ? drain_workqueue+0x170/0x170
> > [ 24.745267] rewind_stack_do_exit+0x11/0x13
> >
>
> Hi Guenter,
>
> Could you share me the .config?
>From your dmesg log, looks the test is run on i386, so please
feel free to try the following patch:
https://marc.info/?l=linux-kernel&m=154772088110800&w=2
Thanks,
Ming
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