Marc MERLIN
2014-Feb-27 19:06 UTC
3.14.0-rc3 btrfs scrub is preventing my laptop from going to sleep
This does not happen consistently, but sometimes: PM: Preparing system for mem sleep Freezing user space processes ... (...) Freezing of tasks failed after 20.002 seconds (1 tasks refusing to freeze, wq_busy=0): btrfs D ffff88017639c800 0 12239 12224 0x00000084 ffff880165ec1960 0000000000000086 ffff880165ec1fd8 ffff88017639c2d0 00000000000141c0 ffff88017639c2d0 ffff88007b874000 ffff8804062fa480 0000000000000000 ffff880175837ec0 ffff88007b874220 ffff880165ec1970 Call Trace: [<ffffffff8160b0d9>] schedule+0x73/0x75 [<ffffffff8126e94c>] scrub_pages+0x27e/0x426 [<ffffffff81085062>] ? finish_wait+0x65/0x65 [<ffffffff81271732>] scrub_stripe+0xada/0xc9e [<ffffffff812719cc>] scrub_chunk.isra.9+0xd6/0x10d [<ffffffff81271c77>] scrub_enumerate_chunks+0x274/0x418 [<ffffffff81085000>] ? finish_wait+0x3/0x65 [<ffffffff812723bb>] btrfs_scrub_dev+0x254/0x3cb [<ffffffff8116ddab>] ? __mnt_want_write+0x62/0x78 [<ffffffff81255c68>] btrfs_ioctl+0x1114/0x24b1 [<ffffffff81140698>] ? ____cache_alloc+0x1c/0x29b [<ffffffff81140a06>] ? kmem_cache_alloc_node+0xef/0x179 [<ffffffff8160d7b3>] ? _raw_spin_unlock+0x17/0x2a [<ffffffff81163ade>] do_vfs_ioctl+0x3d2/0x41d [<ffffffff8116bd00>] ? __fget+0x6f/0x79 [<ffffffff81163b80>] SyS_ioctl+0x57/0x82 [<ffffffff8161426d>] system_call_fastpath+0x1a/0x1f And then I end up with a hot laptop and a mostly dead battery in my backpack. As far as I know, this was not happening with 3.13, unless I'm doing something differently without knowing. My laptop went to sleep just fine while I was typing this Email, so I'm guessing it's only btrfs scrub that causes the problem with sleep. Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ | PGP 1024R/763BE901 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html