On Fri 07-10-16 21:30:39, Dave Chinner wrote: > On Fri, Oct 07, 2016 at 10:13:40AM +0200, Michal Hocko wrote: > > Fix up xfs ML address > > > > On Fri 07-10-16 10:07:39, Michal Hocko wrote: > > > Hi Dave, > > > while playing with the test case you have suggested [1], I have hit the > > > following lockdep splat. This is with mmotm git tree [2] but I didn't > > > get to retest with the current linux-next (or any other tree of your > > > preference) so there is a chance that something is broken in my tree so > > > take this as a heads up. As soon as I am done with testing of the patch > > > in the above email thread I will retest with linux-next. > .... > > > [ 61.878792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 > > > [ 61.878792] 0000000000000000 ffff88001c8b3718 ffffffff81312f78 ffffffff825d99d0 > > > [ 61.878792] ffff88001cd04880 ffff88001c8b3750 ffffffff811260d1 000000000000000a > > > [ 61.878792] ffff88001cd05178 ffff88001cd04880 ffffffff81095395 ffff88001cd04880 > > > [ 61.878792] Call Trace: > > > [ 61.878792] [<ffffffff81312f78>] dump_stack+0x68/0x92 > > > [ 61.878792] [<ffffffff811260d1>] print_usage_bug.part.26+0x25b/0x26a > > > [ 61.878792] [<ffffffff81095395>] ? print_shortest_lock_dependencies+0x17f/0x17f > > > [ 61.878792] [<ffffffff81096074>] mark_lock+0x381/0x56d > > > [ 61.878792] [<ffffffff810962be>] mark_held_locks+0x5e/0x74 > > > [ 61.878792] [<ffffffff8109875c>] lockdep_trace_alloc+0xaf/0xb2 > > > [ 61.878792] [<ffffffff8117d0f7>] kmem_cache_alloc_trace+0x3a/0x270 > > > [ 61.878792] [<ffffffff81169454>] ? vm_map_ram+0x2d2/0x4a6 > > > [ 61.878792] [<ffffffff8116924b>] ? vm_map_ram+0xc9/0x4a6 > > > [ 61.878792] [<ffffffff81169454>] vm_map_ram+0x2d2/0x4a6 > > > [ 61.878792] [<ffffffffa0051069>] _xfs_buf_map_pages+0xae/0x10b [xfs] > > > [ 61.878792] [<ffffffffa0052cd0>] xfs_buf_get_map+0xaa/0x24f [xfs] > > > [ 61.878792] [<ffffffffa0081d10>] xfs_trans_get_buf_map+0x144/0x2ef [xfs] > > Aw, come on! I explained this lockdep annotation bug a couple of > days ago. > > https://www.spinics.net/lists/linux-fsdevel/msg102588.html Ohh, I have missed that one. I have only seen one message from that thread which landed in my inbox but didn't get to see the full thread. Sorry about the noise then! -- Michal Hocko SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
