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Message-ID: <50D0A834.2000505@palosanto.com>
Date: Tue, 18 Dec 2012 12:30:28 -0500
From: Alex Villacís Lasso
<a_villacis@...osanto.com>
To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Lockdep failure in 3.7.0 with zcache
El 18/12/12 11:04, Alex Villacís Lasso escribió:
> I enabled CONFIG_PROVE_LOCKING=y and added slub_debug=FZPU in order to track down https://bugs.freedesktop.org/show_bug.cgi?id=57122 . While running the recompiled kernel with CONFIG_ZCACHE2=y, I got a "INFO: possible irq lock inversion dependency
> detected" message in the kernel log. I was told to report it here.
Got it again:
[ 737.788911] =========================================================
[ 737.788912] [ INFO: possible irq lock inversion dependency detected ]
[ 737.788915] 3.7.0 #6 Not tainted
[ 737.788916] ---------------------------------------------------------
[ 737.788918] yum_childtask.p/3525 just changed the state of lock:
[ 737.788919] (&(&hb->lock)->rlock){+.+.-.}, at: [<ffffffff81521ca3>] tmem_get+0xb3/0x1f0
[ 737.788929] but this lock was taken by another, SOFTIRQ-safe lock in the past:
[ 737.788930] (&(&mapping->tree_lock)->rlock){..-.-.}
[ 737.788930]
[ 737.788930] and interrupts could create inverse lock ordering between them.
[ 737.788930]
[ 737.788933]
[ 737.788933] other info that might help us debug this:
[ 737.788935] Possible interrupt unsafe locking scenario:
[ 737.788935]
[ 737.788936] CPU0 CPU1
[ 737.788937] ---- ----
[ 737.788938] lock(&(&hb->lock)->rlock);
[ 737.788941] local_irq_disable();
[ 737.788942] lock(&(&mapping->tree_lock)->rlock);
[ 737.788944] lock(&(&hb->lock)->rlock);
[ 737.788946] <Interrupt>
[ 737.788947] lock(&(&mapping->tree_lock)->rlock);
[ 737.788950]
[ 737.788950] *** DEADLOCK ***
[ 737.788950]
[ 737.788952] 1 lock held by yum_childtask.p/3525:
[ 737.788953] #0: (&mm->mmap_sem){++++++}, at: [<ffffffff816773f4>] __do_page_fault+0x104/0x5b0
[ 737.788960]
[ 737.788960] the shortest dependencies between 2nd lock and 1st lock:
[ 737.788969] -> (&(&mapping->tree_lock)->rlock){..-.-.} ops: 1439757 {
[ 737.788973] IN-SOFTIRQ-W at:
[ 737.788975] [<ffffffff810c3fd0>] __lock_acquire+0x5d0/0x1c60
[ 737.788980] [<ffffffff810c5c52>] lock_acquire+0x92/0x160
[ 737.788982] [<ffffffff81673c53>] _raw_spin_lock_irqsave+0x53/0x70
[ 737.788985] [<ffffffff811517ba>] test_clear_page_writeback+0x6a/0x1d0
[ 737.788989] [<ffffffff81144844>] end_page_writeback+0x24/0x60
[ 737.788992] [<ffffffff811e0754>] end_buffer_async_write+0x194/0x2b0
[ 737.788996] [<ffffffff811ddd40>] end_bio_bh_io_sync+0x30/0x50
[ 737.788998] [<ffffffff811e297d>] bio_endio+0x1d/0x40
[ 737.789001] [<ffffffff812e2dc3>] req_bio_endio+0xa3/0xe0
[ 737.789003] [<ffffffff812e66a9>] blk_update_request+0x109/0x570
[ 737.789003] [<ffffffff812e6b41>] blk_update_bidi_request+0x31/0x90
[ 737.789003] [<ffffffff812e6bcc>] blk_end_bidi_request+0x2c/0x80
[ 737.789003] [<ffffffff812e6c60>] blk_end_request+0x10/0x20
[ 737.789003] [<ffffffff8141b4df>] scsi_io_completion+0xaf/0x6a0
[ 737.789003] [<ffffffff814116a1>] scsi_finish_command+0xc1/0x120
[ 737.789003] [<ffffffff8141b32f>] scsi_softirq_done+0x13f/0x160
[ 737.789003] [<ffffffff812ee174>] blk_done_softirq+0x94/0xb0
[ 737.789003] [<ffffffff8106b128>] __do_softirq+0xd8/0x2d0
[ 737.789003] [<ffffffff8167cbbc>] call_softirq+0x1c/0x30
[ 737.789003] [<ffffffff810185b5>] do_softirq+0xa5/0xe0
[ 737.789003] [<ffffffff8106b4d6>] irq_exit+0xb6/0xf0
[ 737.789003] [<ffffffff8167d473>] do_IRQ+0x63/0xd0
[ 737.789003] [<ffffffff81673f32>] ret_from_intr+0x0/0x1a
[ 737.789003] [<ffffffff810201df>] cpu_idle+0xdf/0x140
[ 737.789003] [<ffffffff8164cdd1>] rest_init+0xc1/0xd0
[ 737.789003] [<ffffffff81d17c53>] start_kernel+0x3e9/0x3f6
[ 737.789003] [<ffffffff81d17356>] x86_64_start_reservations+0x131/0x135
[ 737.789003] [<ffffffff81d1745c>] x86_64_start_kernel+0x102/0x111
[ 737.789003] IN-RECLAIM_FS-W at:
[ 737.789003] [<ffffffff810c3f64>] __lock_acquire+0x564/0x1c60
[ 737.789003] [<ffffffff810c5c52>] lock_acquire+0x92/0x160
[ 737.789003] [<ffffffff81673a97>] _raw_spin_lock_irq+0x47/0x60
[ 737.789003] [<ffffffff81157a60>] __remove_mapping+0x70/0x160
[ 737.789003] [<ffffffff81158ed2>] shrink_page_list+0x602/0xa00
[ 737.789003] [<ffffffff8115980f>] shrink_inactive_list+0x15f/0x450
[ 737.789003] [<ffffffff8115a278>] shrink_lruvec+0x438/0x550
[ 737.789003] [<ffffffff8115a405>] shrink_zone+0x75/0xa0
[ 737.789003] [<ffffffff8115b81f>] balance_pgdat+0x56f/0x720
[ 737.789003] [<ffffffff8115bb53>] kswapd+0x183/0x510
[ 737.789003] [<ffffffff810883aa>] kthread+0xea/0xf0
[ 737.789003] [<ffffffff8167b86c>] ret_from_fork+0x7c/0xb0
[ 737.789003] INITIAL USE at:
[ 737.789003] [<ffffffff810c3ce4>] __lock_acquire+0x2e4/0x1c60
[ 737.789003] [<ffffffff810c5c52>] lock_acquire+0x92/0x160
[ 737.789003] [<ffffffff81673a97>] _raw_spin_lock_irq+0x47/0x60
[ 737.789003] [<ffffffff8114497b>] add_to_page_cache_locked+0xbb/0x190
[ 737.789003] [<ffffffff81144a71>] add_to_page_cache_lru+0x21/0x50
[ 737.789003] [<ffffffff81144dd5>] grab_cache_page_write_begin+0x95/0xf0
[ 737.789003] [<ffffffff811d2a98>] simple_write_begin+0x38/0x120
[ 737.789003] [<ffffffff81145177>] generic_file_buffered_write+0x107/0x2a0
[ 737.789003] [<ffffffff81146376>] __generic_file_aio_write+0x1b6/0x3b0
[ 737.789003] [<ffffffff811465f1>] generic_file_aio_write+0x81/0x100
[ 737.789003] [<ffffffff811abe63>] do_sync_write+0xa3/0xe0
[ 737.789003] [<ffffffff811ac513>] vfs_write+0xb3/0x180
[ 737.789003] [<ffffffff811ac852>] sys_write+0x52/0xa0
[ 737.789003] [<ffffffff81d19100>] do_copy+0x2b/0x8e
[ 737.789003] [<ffffffff81d18a73>] flush_buffer+0x82/0xb2
[ 737.789003] [<ffffffff81d427fb>] gunzip+0x287/0x32f
[ 737.789003] [<ffffffff81d18ec6>] unpack_to_rootfs+0x172/0x284
[ 737.789003] [<ffffffff81d19698>] populate_rootfs+0x58/0x108
[ 737.789003] [<ffffffff8100207f>] do_one_initcall+0x3f/0x170
[ 737.789003] [<ffffffff8164cfdd>] kernel_init+0x1fd/0x390
[ 737.789003] [<ffffffff8167b86c>] ret_from_fork+0x7c/0xb0
[ 737.789003] }
[ 737.789003] ... key at: [<ffffffff8276ad60>] __key.30173+0x0/0x8
[ 737.789003] ... acquired at:
[ 737.789003] [<ffffffff810c5c52>] lock_acquire+0x92/0x160
[ 737.789003] [<ffffffff8167308b>] _raw_spin_lock+0x3b/0x50
[ 737.789003] [<ffffffff8152189d>] tmem_put+0x8d/0x3e0
[ 737.789003] [<ffffffff8152068b>] zcache_put_page+0xbb/0x120
[ 737.789003] [<ffffffff81520846>] zcache_cleancache_put_page+0x56/0x60
[ 737.789003] [<ffffffff811a9d2e>] __cleancache_put_page+0x7e/0xa0
[ 737.789003] [<ffffffff81145cf8>] __delete_from_page_cache+0x178/0x1a0
[ 737.789003] [<ffffffff81157aa6>] __remove_mapping+0xb6/0x160
[ 737.789003] [<ffffffff81158ed2>] shrink_page_list+0x602/0xa00
[ 737.789003] [<ffffffff8115980f>] shrink_inactive_list+0x15f/0x450
[ 737.789003] [<ffffffff8115a278>] shrink_lruvec+0x438/0x550
[ 737.789003] [<ffffffff8115a405>] shrink_zone+0x75/0xa0
[ 737.789003] [<ffffffff8115b81f>] balance_pgdat+0x56f/0x720
[ 737.789003] [<ffffffff8115bb53>] kswapd+0x183/0x510
[ 737.789003] [<ffffffff810883aa>] kthread+0xea/0xf0
[ 737.789003] [<ffffffff8167b86c>] ret_from_fork+0x7c/0xb0
[ 737.789003]
[ 737.789003] -> (&(&hb->lock)->rlock){+.+.-.} ops: 266 {
[ 737.789003] HARDIRQ-ON-W at:
[ 737.789003] [<ffffffff810c4010>] __lock_acquire+0x610/0x1c60
[ 737.789003] [<ffffffff810c5c52>] lock_acquire+0x92/0x160
[ 737.789003] [<ffffffff8167308b>] _raw_spin_lock+0x3b/0x50
[ 737.789003] [<ffffffff8152202d>] tmem_destroy_pool+0x3d/0xd0
[ 737.789003] [<ffffffff8151fc7b>] zcache_cleancache_flush_fs+0x5b/0x90
[ 737.789003] [<ffffffff811a9e35>] __cleancache_invalidate_fs+0x25/0x30
[ 737.789003] [<ffffffff811ae8ad>] deactivate_locked_super+0x6d/0x90
[ 737.789003] [<ffffffff811af55e>] deactivate_super+0x4e/0x70
[ 737.789003] [<ffffffff811cb6ba>] mntput_no_expire+0xda/0x140
[ 737.789003] [<ffffffff811cc781>] sys_umount+0x71/0x3a0
[ 737.789003] [<ffffffff8167b919>] system_call_fastpath+0x16/0x1b
[ 737.789003] SOFTIRQ-ON-W at:
[ 737.789003] [<ffffffff810c4043>] __lock_acquire+0x643/0x1c60
[ 737.789003] [<ffffffff810c5c52>] lock_acquire+0x92/0x160
[ 737.789003] [<ffffffff8167308b>] _raw_spin_lock+0x3b/0x50
[ 737.789003] [<ffffffff81521ca3>] tmem_get+0xb3/0x1f0
[ 737.789003] [<ffffffff815208fd>] zcache_get_page+0xad/0x120
[ 737.789003] [<ffffffff81520a74>] zcache_cleancache_get_page+0x54/0x70
[ 737.789003] [<ffffffff811a9ddd>] __cleancache_get_page+0x8d/0xc0
[ 737.789003] [<ffffffff811eac4a>] do_mpage_readpage+0x2fa/0x640
[ 737.789003] [<ffffffff811eb0cf>] mpage_readpages+0xcf/0x120
[ 737.789003] [<ffffffff8123261d>] ext4_readpages+0x1d/0x20
[ 737.789003] [<ffffffff81151d1a>] __do_page_cache_readahead+0x21a/0x2c0
[ 737.789003] [<ffffffff81151f51>] ra_submit+0x21/0x30
[ 737.789003] [<ffffffff81147227>] filemap_fault+0x267/0x4c0
[ 737.789003] [<ffffffff8116c94f>] __do_fault+0x6f/0x550
[ 737.789003] [<ffffffff8116f7c0>] handle_pte_fault+0x90/0x9f0
[ 737.789003] [<ffffffff81171341>] handle_mm_fault+0x251/0x310
[ 737.789003] [<ffffffff81677464>] __do_page_fault+0x174/0x5b0
[ 737.789003] [<ffffffff816778ae>] do_page_fault+0xe/0x10
[ 737.789003] [<ffffffff816742f8>] page_fault+0x28/0x30
[ 737.789003] IN-RECLAIM_FS-W at:
[ 737.789003] [<ffffffff810c3f64>] __lock_acquire+0x564/0x1c60
[ 737.789003] [<ffffffff810c5c52>] lock_acquire+0x92/0x160
[ 737.789003] [<ffffffff8167308b>] _raw_spin_lock+0x3b/0x50
[ 737.789003] [<ffffffff8152189d>] tmem_put+0x8d/0x3e0
[ 737.789003] [<ffffffff8152068b>] zcache_put_page+0xbb/0x120
[ 737.789003] [<ffffffff81520846>] zcache_cleancache_put_page+0x56/0x60
[ 737.789003] [<ffffffff811a9d2e>] __cleancache_put_page+0x7e/0xa0
[ 737.789003] [<ffffffff81145cf8>] __delete_from_page_cache+0x178/0x1a0
[ 737.789003] [<ffffffff81157aa6>] __remove_mapping+0xb6/0x160
[ 737.789003] [<ffffffff81158ed2>] shrink_page_list+0x602/0xa00
[ 737.789003] [<ffffffff8115980f>] shrink_inactive_list+0x15f/0x450
[ 737.789003] [<ffffffff8115a278>] shrink_lruvec+0x438/0x550
[ 737.789003] [<ffffffff8115a405>] shrink_zone+0x75/0xa0
[ 737.789003] [<ffffffff8115b81f>] balance_pgdat+0x56f/0x720
[ 737.789003] [<ffffffff8115bb53>] kswapd+0x183/0x510
[ 737.789003] [<ffffffff810883aa>] kthread+0xea/0xf0
[ 737.789003] [<ffffffff8167b86c>] ret_from_fork+0x7c/0xb0
[ 737.789003] INITIAL USE at:
[ 737.789003] [<ffffffff810c3ce4>] __lock_acquire+0x2e4/0x1c60
[ 737.789003] [<ffffffff810c5c52>] lock_acquire+0x92/0x160
[ 737.789003] [<ffffffff8167308b>] _raw_spin_lock+0x3b/0x50
[ 737.789003] [<ffffffff8152202d>] tmem_destroy_pool+0x3d/0xd0
[ 737.789003] [<ffffffff8151fc7b>] zcache_cleancache_flush_fs+0x5b/0x90
[ 737.789003] [<ffffffff811a9e35>] __cleancache_invalidate_fs+0x25/0x30
[ 737.789003] [<ffffffff811ae8ad>] deactivate_locked_super+0x6d/0x90
[ 737.789003] [<ffffffff811af55e>] deactivate_super+0x4e/0x70
[ 737.789003] [<ffffffff811cb6ba>] mntput_no_expire+0xda/0x140
[ 737.789003] [<ffffffff811cc781>] sys_umount+0x71/0x3a0
[ 737.789003] [<ffffffff8167b919>] system_call_fastpath+0x16/0x1b
[ 737.789003] }
[ 737.789003] ... key at: [<ffffffff8280ce20>] __key.20361+0x0/0x20
[ 737.789003] ... acquired at:
[ 737.789003] [<ffffffff810c3028>] check_usage_backwards+0x108/0x140
[ 737.789003] [<ffffffff810c38a8>] mark_lock+0x198/0x2f0
[ 737.789003] [<ffffffff810c4043>] __lock_acquire+0x643/0x1c60
[ 737.789003] [<ffffffff810c5c52>] lock_acquire+0x92/0x160
[ 737.789003] [<ffffffff8167308b>] _raw_spin_lock+0x3b/0x50
[ 737.789003] [<ffffffff81521ca3>] tmem_get+0xb3/0x1f0
[ 737.789003] [<ffffffff815208fd>] zcache_get_page+0xad/0x120
[ 737.789003] [<ffffffff81520a74>] zcache_cleancache_get_page+0x54/0x70
[ 737.789003] [<ffffffff811a9ddd>] __cleancache_get_page+0x8d/0xc0
[ 737.789003] [<ffffffff811eac4a>] do_mpage_readpage+0x2fa/0x640
[ 737.789003] [<ffffffff811eb0cf>] mpage_readpages+0xcf/0x120
[ 737.789003] [<ffffffff8123261d>] ext4_readpages+0x1d/0x20
[ 737.789003] [<ffffffff81151d1a>] __do_page_cache_readahead+0x21a/0x2c0
[ 737.789003] [<ffffffff81151f51>] ra_submit+0x21/0x30
[ 737.789003] [<ffffffff81147227>] filemap_fault+0x267/0x4c0
[ 737.789003] [<ffffffff8116c94f>] __do_fault+0x6f/0x550
[ 737.789003] [<ffffffff8116f7c0>] handle_pte_fault+0x90/0x9f0
[ 737.789003] [<ffffffff81171341>] handle_mm_fault+0x251/0x310
[ 737.789003] [<ffffffff81677464>] __do_page_fault+0x174/0x5b0
[ 737.789003] [<ffffffff816778ae>] do_page_fault+0xe/0x10
[ 737.789003] [<ffffffff816742f8>] page_fault+0x28/0x30
[ 737.789003]
[ 737.789003]
[ 737.789003] stack backtrace:
[ 737.789003] Pid: 3525, comm: yum_childtask.p Not tainted 3.7.0 #6
[ 737.789003] Call Trace:
[ 737.789003] [<ffffffff810c2dd8>] print_irq_inversion_bug.part.14+0x1e8/0x1f0
[ 737.789003] [<ffffffff810c3028>] check_usage_backwards+0x108/0x140
[ 737.789003] [<ffffffff810c38a8>] mark_lock+0x198/0x2f0
[ 737.789003] [<ffffffff810c2f20>] ? check_usage_forwards+0x140/0x140
[ 737.789003] [<ffffffff810c4043>] __lock_acquire+0x643/0x1c60
[ 737.789003] [<ffffffff810c6715>] ? trace_hardirqs_on_caller+0x105/0x190
[ 737.789003] [<ffffffff810c67ad>] ? trace_hardirqs_on+0xd/0x10
[ 737.789003] [<ffffffff8167362a>] ? _raw_spin_unlock_irqrestore+0x4a/0x90
[ 737.789003] [<ffffffff8166978e>] ? __slab_free+0x30a/0x366
[ 737.789003] [<ffffffff810c6556>] ? mark_held_locks+0x86/0x140
[ 737.789003] [<ffffffff81521ca3>] ? tmem_get+0xb3/0x1f0
[ 737.789003] [<ffffffff810c5c52>] lock_acquire+0x92/0x160
[ 737.789003] [<ffffffff81521ca3>] ? tmem_get+0xb3/0x1f0
[ 737.789003] [<ffffffff81263c05>] ? ext4_ext_map_blocks+0x1b5/0x1360
[ 737.789003] [<ffffffff8167308b>] _raw_spin_lock+0x3b/0x50
[ 737.789003] [<ffffffff81521ca3>] ? tmem_get+0xb3/0x1f0
[ 737.789003] [<ffffffff81234851>] ? ext4_map_blocks+0x191/0x2c0
[ 737.789003] [<ffffffff81521ca3>] tmem_get+0xb3/0x1f0
[ 737.789003] [<ffffffff815208fd>] zcache_get_page+0xad/0x120
[ 737.789003] [<ffffffff81520a74>] zcache_cleancache_get_page+0x54/0x70
[ 737.789003] [<ffffffff811a9ddd>] __cleancache_get_page+0x8d/0xc0
[ 737.789003] [<ffffffff811eac4a>] do_mpage_readpage+0x2fa/0x640
[ 737.789003] [<ffffffff811535e7>] ? __lru_cache_add+0x87/0xf0
[ 737.789003] [<ffffffff811eb0cf>] mpage_readpages+0xcf/0x120
[ 737.789003] [<ffffffff81236f20>] ? noalloc_get_block_write+0x30/0x30
[ 737.789003] [<ffffffff81236f20>] ? noalloc_get_block_write+0x30/0x30
[ 737.789003] [<ffffffff8123261d>] ext4_readpages+0x1d/0x20
[ 737.789003] [<ffffffff81151d1a>] __do_page_cache_readahead+0x21a/0x2c0
[ 737.789003] [<ffffffff81151bbe>] ? __do_page_cache_readahead+0xbe/0x2c0
[ 737.789003] [<ffffffff81151f51>] ra_submit+0x21/0x30
[ 737.789003] [<ffffffff81147227>] filemap_fault+0x267/0x4c0
[ 737.789003] [<ffffffff8116c94f>] __do_fault+0x6f/0x550
[ 737.789003] [<ffffffff810c3ce4>] ? __lock_acquire+0x2e4/0x1c60
[ 737.789003] [<ffffffff8116f7c0>] handle_pte_fault+0x90/0x9f0
[ 737.789003] [<ffffffff811a169b>] ? mem_cgroup_count_vm_event+0x1b/0xc0
[ 737.789003] [<ffffffff816773f4>] ? __do_page_fault+0x104/0x5b0
[ 737.789003] [<ffffffff81171341>] handle_mm_fault+0x251/0x310
[ 737.789003] [<ffffffff81677464>] __do_page_fault+0x174/0x5b0
[ 737.789003] [<ffffffff8116c3d0>] ? might_fault+0x40/0x90
[ 737.789003] [<ffffffff816735a0>] ? _raw_spin_unlock_irq+0x30/0x70
[ 737.789003] [<ffffffff810c6715>] ? trace_hardirqs_on_caller+0x105/0x190
[ 737.789003] [<ffffffff810c67ad>] ? trace_hardirqs_on+0xd/0x10
[ 737.789003] [<ffffffff8131505d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 737.789003] [<ffffffff816778ae>] do_page_fault+0xe/0x10
[ 737.789003] [<ffffffff816742f8>] page_fault+0x28/0x30
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