[300095.824402] Freezing user space processes ... 
[300115.827503] Freezing of tasks failed after 20.00 seconds (1 tasks refusing to freeze):
[300115.827509]   task                        PC stack   pid father
(...etc. etc. a lot of processes. This is the interesting one,)
[300115.851715] pacman        D 0000000000000000     0 22938  24275 0x00800004
[300115.851721]  ffff88007dc5a170 0000000000000086 0000000000000000 ffff88006eef1140
[300115.851730]  ffff88006edae630 ffff88000f51c380 ffffffff8149e880 ffff880016566000
[300115.851738]  ffff88007dc5a418 000000000000f908 ffff88007dc5a418 ffff880016566000
[300115.851746] Call Trace:
[300115.851752]  [<ffffffff8112b404>] ? __wait_on_freeing_inode+0x84/0xb0
[300115.851757]  [<ffffffff81075fd0>] ? wake_bit_function+0x0/0x40
[300115.851763]  [<ffffffff8112b47e>] ? find_inode_fast+0x4e/0x70
[300115.851769]  [<ffffffff8112b4d5>] ? ifind_fast+0x35/0xa0
[300115.851773]  [<ffffffff8112c4b4>] ? iget_locked+0x44/0x190
[300115.851784]  [<ffffffffa00bbde5>] ? ext3_iget+0x35/0x4c0 [ext3]
[300115.851790]  [<ffffffff8133861d>] ? __mutex_lock_slowpath+0x23d/0x330
[300115.851799]  [<ffffffffa00c3188>] ? ext3_lookup+0xa8/0x130 [ext3]
[300115.851805]  [<ffffffff8111ea5c>] ? do_lookup+0x19c/0x240
[300115.851810]  [<ffffffff81121250>] ? __link_path_walk+0x720/0xf50
[300115.851818]  [<ffffffffa00a4e34>] ? do_get_write_access+0x404/0x690 [jbd]
[300115.851827]  [<ffffffffa00c4448>] ? htree_dirblock_to_tree+0x138/0x1a0 [ext3]
[300115.851834]  [<ffffffff81121c64>] ? path_walk+0x54/0xb0
[300115.851839]  [<ffffffff81121d0b>] ? do_path_lookup+0x4b/0x90
[300115.851844]  [<ffffffff811229ea>] ? user_path_at+0x5a/0xb0
[300115.851852]  [<ffffffffa00a419f>] ? journal_stop+0x1ef/0x2a0 [jbd]
[300115.851862]  [<ffffffffa00bc363>] ? ext3_mark_inode_dirty+0x33/0x50 [ext3]
[300115.851872]  [<ffffffffa00c664d>] ? __ext3_journal_stop+0x2d/0x60 [ext3]
[300115.851878]  [<ffffffff81119116>] ? vfs_fstatat+0x36/0x80
[300115.851883]  [<ffffffff811191ef>] ? sys_newlstat+0x1f/0x50
[300115.851888]  [<ffffffff81125630>] ? filldir+0x0/0xe0
[300115.851893]  [<ffffffff81125863>] ? vfs_readdir+0xa3/0xe0
[300115.851899]  [<ffffffff81125a42>] ? sys_getdents+0xb2/0xf0
[300115.851904]  [<ffffffff810120c2>] ? system_call_fastpath+0x16/0x1b