3.16.0-0.rc3.git3.1.fc21.x86_64 seems to have a problem with zram
the trace below happens often due "dnf clean all && dnf upgrade"
is called the first time after a reboot
[root@rawhide ~]# dmesg -c
[51104.945865] =========================================================
[51104.945900] [ INFO: possible irq lock inversion dependency detected ]
[51104.945934] 3.16.0-0.rc3.git3.1.fc21.x86_64 #1 Tainted: G W
[51104.945967] ---------------------------------------------------------
[51104.946000] kswapd0/58 just changed the state of lock:
[51104.946028] (&zram->init_lock){++++.-}, at: [<ffffffffa0042696>] zram_make_request+0x46/0x350 [zram]
[51104.946162] but this lock took another, RECLAIM_FS-unsafe lock in the past:
[51104.946197] (&bdev->bd_mutex){+.+.+.}
and interrupts could create inverse lock ordering between them.
[51104.946278]
other info that might help us debug this:
[51104.946305] Possible interrupt unsafe locking scenario:
[51104.946334] CPU0 CPU1
[51104.946358] ---- ----
[51104.946543] lock(&bdev->bd_mutex);
[51104.946599] local_irq_disable();
[51104.946676] lock(&zram->init_lock);
[51104.946773] lock(&bdev->bd_mutex);
[51104.946869] <Interrupt>
[51104.946926] lock(&zram->init_lock);
[51104.947002]
*** DEADLOCK ***
[51104.947109] no locks held by kswapd0/58.
[51104.947172]
the shortest dependencies between 2nd lock and 1st lock:
[51104.947281] -> (&bdev->bd_mutex){+.+.+.} ops: 227 {
[51104.947547] HARDIRQ-ON-W at:
[51104.947610] [<ffffffff811004c2>] __lock_acquire+0x942/0x1ca0
[51104.947701] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.947781] [<ffffffff8180ccd5>] mutex_lock_nested+0x85/0x440
[51104.947868] [<ffffffff8128dbd6>] __blkdev_get+0x76/0x4e0
[51104.947953] [<ffffffff8128e090>] blkdev_get+0x50/0x400
[51104.948032] [<ffffffff813c6aff>] add_disk+0x46f/0x510
[51104.948116] [<ffffffff8155b005>] sd_probe_async+0x115/0x1e0
[51104.948200] [<ffffffff810d1319>] async_run_entry_fn+0x39/0x120
[51104.948287] [<ffffffff810c0561>] process_one_work+0x211/0x6f0
[51104.948371] [<ffffffff810c0aab>] worker_thread+0x6b/0x540
[51104.948598] [<ffffffff810c8d48>] kthread+0x108/0x120
[51104.948677] [<ffffffff8181183c>] ret_from_fork+0x7c/0xb0
[51104.948758] SOFTIRQ-ON-W at:
[51104.948822] [<ffffffff811004f2>] __lock_acquire+0x972/0x1ca0
[51104.948905] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.948985] [<ffffffff8180ccd5>] mutex_lock_nested+0x85/0x440
[51104.949067] [<ffffffff8128dbd6>] __blkdev_get+0x76/0x4e0
[51104.949147] [<ffffffff8128e090>] blkdev_get+0x50/0x400
[51104.949242] [<ffffffff813c6aff>] add_disk+0x46f/0x510
[51104.949321] [<ffffffff8155b005>] sd_probe_async+0x115/0x1e0
[51104.949548] [<ffffffff810d1319>] async_run_entry_fn+0x39/0x120
[51104.949631] [<ffffffff810c0561>] process_one_work+0x211/0x6f0
[51104.949713] [<ffffffff810c0aab>] worker_thread+0x6b/0x540
[51104.949793] [<ffffffff810c8d48>] kthread+0x108/0x120
[51104.949872] [<ffffffff8181183c>] ret_from_fork+0x7c/0xb0
[51104.949952] RECLAIM_FS-ON-W at:
[51104.950016] [<ffffffff810ff59c>] mark_held_locks+0x7c/0xb0
[51104.950099] [<ffffffff81102bcb>] lockdep_trace_alloc+0x8b/0xf0
[51104.950182] [<ffffffff81224a76>] kmem_cache_alloc_trace+0x36/0x330
[51104.950270] [<ffffffff81559106>] sd_revalidate_disk+0x86/0x1e70
[51104.950354] [<ffffffff813c92d1>] rescan_partitions+0x81/0x2d0
[51104.950596] [<ffffffff8128ded3>] __blkdev_get+0x373/0x4e0
[51104.950675] [<ffffffff8128e090>] blkdev_get+0x50/0x400
[51104.950754] [<ffffffff813c6aff>] add_disk+0x46f/0x510
[51104.950832] [<ffffffff8155b005>] sd_probe_async+0x115/0x1e0
[51104.950912] [<ffffffff810d1319>] async_run_entry_fn+0x39/0x120
[51104.951015] [<ffffffff810c0561>] process_one_work+0x211/0x6f0
[51104.951096] [<ffffffff810c0aab>] worker_thread+0x6b/0x540
[51104.951175] [<ffffffff810c8d48>] kthread+0x108/0x120
[51104.951256] [<ffffffff8181183c>] ret_from_fork+0x7c/0xb0
[51104.951336] INITIAL USE at:
[51104.951542] [<ffffffff810fffb7>] __lock_acquire+0x437/0x1ca0
[51104.951621] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.951720] [<ffffffff8180ccd5>] mutex_lock_nested+0x85/0x440
[51104.951800] [<ffffffff8128dbd6>] __blkdev_get+0x76/0x4e0
[51104.951877] [<ffffffff8128e090>] blkdev_get+0x50/0x400
[51104.951954] [<ffffffff813c6aff>] add_disk+0x46f/0x510
[51104.952031] [<ffffffff8155b005>] sd_probe_async+0x115/0x1e0
[51104.952110] [<ffffffff810d1319>] async_run_entry_fn+0x39/0x120
[51104.952212] [<ffffffff810c0561>] process_one_work+0x211/0x6f0
[51104.952304] [<ffffffff810c0aab>] worker_thread+0x6b/0x540
[51104.952382] [<ffffffff810c8d48>] kthread+0x108/0x120
[51104.952604] [<ffffffff8181183c>] ret_from_fork+0x7c/0xb0
[51104.952682] }
[51104.952725] ... key at: [<ffffffff832aadb8>] __key.34230+0x0/0x8
[51104.952806] ... acquired at:
[51104.952854] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.952926] [<ffffffff8180ccd5>] mutex_lock_nested+0x85/0x440
[51104.953021] [<ffffffff8128d1eb>] revalidate_disk+0x4b/0x80
[51104.953093] [<ffffffffa0041e6b>] disksize_store+0x11b/0x1f0 [zram]
[51104.953168] [<ffffffff8151a598>] dev_attr_store+0x18/0x30
[51104.953242] [<ffffffff812d8c35>] sysfs_kf_write+0x45/0x60
[51104.953317] [<ffffffff812d7f99>] kernfs_fop_write+0xf9/0x180
[51104.953547] [<ffffffff8124b9ea>] vfs_write+0xba/0x200
[51104.953625] [<ffffffff8124c65c>] SyS_write+0x5c/0xd0
[51104.953699] [<ffffffff818118e9>] system_call_fastpath+0x16/0x1b
[51104.953826] -> (&zram->init_lock){++++.-} ops: 299 {
[51104.953942] HARDIRQ-ON-W at:
[51104.954003] [<ffffffff811004c2>] __lock_acquire+0x942/0x1ca0
[51104.954082] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.954159] [<ffffffff8180f52a>] down_write+0x5a/0xc0
[51104.954246] [<ffffffffa0041e38>] disksize_store+0xe8/0x1f0 [zram]
[51104.954349] [<ffffffff8151a598>] dev_attr_store+0x18/0x30
[51104.954571] [<ffffffff812d8c35>] sysfs_kf_write+0x45/0x60
[51104.954649] [<ffffffff812d7f99>] kernfs_fop_write+0xf9/0x180
[51104.954728] [<ffffffff8124b9ea>] vfs_write+0xba/0x200
[51104.954804] [<ffffffff8124c65c>] SyS_write+0x5c/0xd0
[51104.954880] [<ffffffff818118e9>] system_call_fastpath+0x16/0x1b
[51104.954960] HARDIRQ-ON-R at:
[51104.955031] [<ffffffff810fff23>] __lock_acquire+0x3a3/0x1ca0
[51104.955120] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.955197] [<ffffffff8180f481>] down_read+0x51/0xa0
[51104.955273] [<ffffffffa0042696>] zram_make_request+0x46/0x350 [zram]
[51104.955354] [<ffffffff813b4088>] generic_make_request+0xf8/0x150
[51104.955586] [<ffffffff813b4158>] submit_bio+0x78/0x190
[51104.955662] [<ffffffff812880e0>] _submit_bh+0x140/0x230
[51104.955751] [<ffffffff81289daf>] block_read_full_page+0x28f/0x350
[51104.955864] [<ffffffff8128c9b8>] blkdev_readpage+0x18/0x20
[51104.955942] [<ffffffff811d151c>] __do_page_cache_readahead+0x32c/0x340
[51104.956029] [<ffffffff811d1a74>] force_page_cache_readahead+0x34/0x60
[51104.956112] [<ffffffff811d1ae6>] page_cache_sync_readahead+0x46/0x50
[51104.956194] [<ffffffff811c32a9>] generic_file_read_iter+0x519/0x630
[51104.956276] [<ffffffff8128cf67>] blkdev_read_iter+0x37/0x40
[51104.956366] [<ffffffff8124b07b>] new_sync_read+0x8b/0xd0
[51104.956603] [<ffffffff8124b847>] vfs_read+0x97/0x180
[51104.956679] [<ffffffff8124c58c>] SyS_read+0x5c/0xd0
[51104.956755] [<ffffffff818118e9>] system_call_fastpath+0x16/0x1b
[51104.956835] SOFTIRQ-ON-W at:
[51104.956895] [<ffffffff811004f2>] __lock_acquire+0x972/0x1ca0
[51104.956974] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.957061] [<ffffffff8180f52a>] down_write+0x5a/0xc0
[51104.957148] [<ffffffffa0041e38>] disksize_store+0xe8/0x1f0 [zram]
[51104.957229] [<ffffffff8151a598>] dev_attr_store+0x18/0x30
[51104.957306] [<ffffffff812d8c35>] sysfs_kf_write+0x45/0x60
[51104.957384] [<ffffffff812d7f99>] kernfs_fop_write+0xf9/0x180
[51104.957608] [<ffffffff8124b9ea>] vfs_write+0xba/0x200
[51104.957684] [<ffffffff8124c65c>] SyS_write+0x5c/0xd0
[51104.957760] [<ffffffff818118e9>] system_call_fastpath+0x16/0x1b
[51104.957862] SOFTIRQ-ON-R at:
[51104.957922] [<ffffffff811004f2>] __lock_acquire+0x972/0x1ca0
[51104.958001] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.958078] [<ffffffff8180f481>] down_read+0x51/0xa0
[51104.958153] [<ffffffffa0042696>] zram_make_request+0x46/0x350 [zram]
[51104.958235] [<ffffffff813b4088>] generic_make_request+0xf8/0x150
[51104.958315] [<ffffffff813b4158>] submit_bio+0x78/0x190
[51104.958577] [<ffffffff812880e0>] _submit_bh+0x140/0x230
[51104.958688] [<ffffffff81289daf>] block_read_full_page+0x28f/0x350
[51104.958769] [<ffffffff8128c9b8>] blkdev_readpage+0x18/0x20
[51104.958847] [<ffffffff811d151c>] __do_page_cache_readahead+0x32c/0x340
[51104.958930] [<ffffffff811d1a74>] force_page_cache_readahead+0x34/0x60
[51104.959011] [<ffffffff811d1ae6>] page_cache_sync_readahead+0x46/0x50
[51104.959127] [<ffffffff811c32a9>] generic_file_read_iter+0x519/0x630
[51104.959209] [<ffffffff8128cf67>] blkdev_read_iter+0x37/0x40
[51104.959287] [<ffffffff8124b07b>] new_sync_read+0x8b/0xd0
[51104.959364] [<ffffffff8124b847>] vfs_read+0x97/0x180
[51104.959607] [<ffffffff8124c58c>] SyS_read+0x5c/0xd0
[51104.959684] [<ffffffff818118e9>] system_call_fastpath+0x16/0x1b
[51104.959764] IN-RECLAIM_FS-R at:
[51104.959837] [<ffffffff810fff8f>] __lock_acquire+0x40f/0x1ca0
[51104.959927] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.960005] [<ffffffff8180f481>] down_read+0x51/0xa0
[51104.960082] [<ffffffffa0042696>] zram_make_request+0x46/0x350 [zram]
[51104.960165] [<ffffffff813b4088>] generic_make_request+0xf8/0x150
[51104.960268] [<ffffffff813b4158>] submit_bio+0x78/0x190
[51104.960345] [<ffffffff812097ba>] __swap_writepage+0x24a/0x2a0
[51104.960596] [<ffffffff81209849>] swap_writepage+0x39/0x80
[51104.960678] [<ffffffff811df1d0>] shmem_writepage+0x1b0/0x2e0
[51104.960761] [<ffffffff811d8ef1>] shrink_page_list+0x541/0xca0
[51104.960844] [<ffffffff811d9d2d>] shrink_inactive_list+0x1bd/0x600
[51104.960929] [<ffffffff811daa63>] shrink_lruvec+0x533/0x6e0
[51104.961015] [<ffffffff811dac9c>] shrink_zone+0x8c/0x1d0
[51104.961106] [<ffffffff811dbbcb>] kswapd_shrink_zone+0x10b/0x1f0
[51104.961202] [<ffffffff811dc609>] balance_pgdat+0x329/0x4c0
[51104.961281] [<ffffffff811dc95b>] kswapd+0x1bb/0x620
[51104.961357] [<ffffffff810c8d48>] kthread+0x108/0x120
[51104.961576] [<ffffffff8181183c>] ret_from_fork+0x7c/0xb0
[51104.961655] INITIAL USE at:
[51104.961716] [<ffffffff810fffb7>] __lock_acquire+0x437/0x1ca0
[51104.961794] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.961893] [<ffffffff8180f52a>] down_write+0x5a/0xc0
[51104.961969] [<ffffffffa0041e38>] disksize_store+0xe8/0x1f0 [zram]
[51104.962049] [<ffffffff8151a598>] dev_attr_store+0x18/0x30
[51104.962126] [<ffffffff812d8c35>] sysfs_kf_write+0x45/0x60
[51104.962204] [<ffffffff812d7f99>] kernfs_fop_write+0xf9/0x180
[51104.962295] [<ffffffff8124b9ea>] vfs_write+0xba/0x200
[51104.962373] [<ffffffff8124c65c>] SyS_write+0x5c/0xd0
[51104.962599] [<ffffffff818118e9>] system_call_fastpath+0x16/0x1b
[51104.962690] }
[51104.962733] ... key at: [<ffffffffa0044780>] __key.32748+0x0/0xffffffffffffe880 [zram]
[51104.962816] ... acquired at:
[51104.962864] [<ffffffff810fe6a0>] check_usage_forwards+0x170/0x180
[51104.962938] [<ffffffff810ff240>] mark_lock+0x3f0/0x6d0
[51104.963009] [<ffffffff810fff8f>] __lock_acquire+0x40f/0x1ca0
[51104.963081] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.963151] [<ffffffff8180f481>] down_read+0x51/0xa0
[51104.963243] [<ffffffffa0042696>] zram_make_request+0x46/0x350 [zram]
[51104.963611] [<ffffffff813b4088>] generic_make_request+0xf8/0x150
[51104.963685] [<ffffffff813b4158>] submit_bio+0x78/0x190
[51104.963756] [<ffffffff812097ba>] __swap_writepage+0x24a/0x2a0
[51104.963829] [<ffffffff81209849>] swap_writepage+0x39/0x80
[51104.963912] [<ffffffff811df1d0>] shmem_writepage+0x1b0/0x2e0
[51104.963996] [<ffffffff811d8ef1>] shrink_page_list+0x541/0xca0
[51104.964069] [<ffffffff811d9d2d>] shrink_inactive_list+0x1bd/0x600
[51104.964144] [<ffffffff811daa63>] shrink_lruvec+0x533/0x6e0
[51104.964215] [<ffffffff811dac9c>] shrink_zone+0x8c/0x1d0
[51104.964298] [<ffffffff811dbbcb>] kswapd_shrink_zone+0x10b/0x1f0
[51104.964372] [<ffffffff811dc609>] balance_pgdat+0x329/0x4c0
[51104.964586] [<ffffffff811dc95b>] kswapd+0x1bb/0x620
[51104.964678] [<ffffffff810c8d48>] kthread+0x108/0x120
[51104.964748] [<ffffffff8181183c>] ret_from_fork+0x7c/0xb0
[51104.964862]
stack backtrace:
[51104.964941] CPU: 0 PID: 58 Comm: kswapd0 Tainted: G W 3.16.0-0.rc3.git3.1.fc21.x86_64 #1
[51104.965044] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00
07/31/2013
[51104.965154] 0000000000000000 000000008d3cfd17 ffff88001acaf390 ffffffff81807cec
[51104.965291] ffffffff82f7a440 ffff88001acaf3d0 ffffffff81805252 ffffffff81c67a5f
[51104.965552] ffff88001ac43f08 ffff88001ac433a0 ffffffff81c67a5f 0000000000000000
[51104.965668] Call Trace:
[51104.965719] [<ffffffff81807cec>] dump_stack+0x4d/0x66
[51104.965778] [<ffffffff81805252>] print_irq_inversion_bug.part.42+0x1b8/0x1c4
[51104.965845] [<ffffffff810fe6a0>] check_usage_forwards+0x170/0x180
[51104.965908] [<ffffffff810ff240>] mark_lock+0x3f0/0x6d0
[51104.965989] [<ffffffff810fe530>] ? print_shortest_lock_dependencies+0x1d0/0x1d0
[51104.966056] [<ffffffff810fff8f>] __lock_acquire+0x40f/0x1ca0
[51104.966121] [<ffffffff81024369>] ? sched_clock+0x9/0x10
[51104.966180] [<ffffffff810e1e05>] ? local_clock+0x25/0x30
[51104.966240] [<ffffffff813d828d>] ? blk_throtl_bio+0x26d/0x640
[51104.966301] [<ffffffff813d80a0>] ? blk_throtl_bio+0x80/0x640
[51104.966362] [<ffffffff81102104>] lock_acquire+0xa4/0x1d0
[51104.966581] [<ffffffffa0042696>] ? zram_make_request+0x46/0x350 [zram]
[51104.966648] [<ffffffff8180f481>] down_read+0x51/0xa0
[51104.966718] [<ffffffffa0042696>] ? zram_make_request+0x46/0x350 [zram]
[51104.966782] [<ffffffffa0042696>] zram_make_request+0x46/0x350 [zram]
[51104.966846] [<ffffffff813b3d19>] ? generic_make_request_checks+0x349/0x5c0
[51104.966912] [<ffffffff81024369>] ? sched_clock+0x9/0x10
[51104.966971] [<ffffffff810e1e05>] ? local_clock+0x25/0x30
[51104.967030] [<ffffffff813b4088>] generic_make_request+0xf8/0x150
[51104.967093] [<ffffffff813b4158>] submit_bio+0x78/0x190
[51104.967152] [<ffffffff812097ba>] __swap_writepage+0x24a/0x2a0
[51104.967213] [<ffffffff810e1e05>] ? local_clock+0x25/0x30
[51104.967295] [<ffffffff810fc24f>] ? lock_release_holdtime.part.28+0xf/0x200
[51104.967362] [<ffffffff81810a67>] ? _raw_spin_unlock+0x27/0x40
[51104.967568] [<ffffffff8120cd4c>] ? page_swapcount+0x4c/0x60
[51104.967629] [<ffffffff81209849>] swap_writepage+0x39/0x80
[51104.967691] [<ffffffff811df1d0>] shmem_writepage+0x1b0/0x2e0
[51104.967752] [<ffffffff811d8ef1>] shrink_page_list+0x541/0xca0
[51104.967814] [<ffffffff811d9d2d>] shrink_inactive_list+0x1bd/0x600
[51104.967876] [<ffffffff811daa63>] shrink_lruvec+0x533/0x6e0
[51104.967936] [<ffffffff811dac9c>] shrink_zone+0x8c/0x1d0
[51104.968017] [<ffffffff811dbbcb>] kswapd_shrink_zone+0x10b/0x1f0
[51104.968079] [<ffffffff811dc609>] balance_pgdat+0x329/0x4c0
[51104.968139] [<ffffffff811dc95b>] kswapd+0x1bb/0x620
[51104.968196] [<ffffffff810f54c0>] ? abort_exclusive_wait+0xb0/0xb0
[51104.968259] [<ffffffff811dc7a0>] ? balance_pgdat+0x4c0/0x4c0
[51104.968320] [<ffffffff810c8d48>] kthread+0x108/0x120
[51104.968378] [<ffffffff810ff72d>] ? trace_hardirqs_on_caller+0x15d/0x200
[51104.968589] [<ffffffff810c8c40>] ? insert_kthread_work+0x80/0x80
[51104.968651] [<ffffffff8181183c>] ret_from_fork+0x7c/0xb0
[51104.968722] [<ffffffff810c8c40>] ? insert_kthread_work+0x80/0x80
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