And again, another hang. It looks like the inode deletion never finishes. The good thing is that I do not see any LRU related BUG_ONs anymore. I am going to test with the other patch in the thread. 2476 [<ffffffff8118325e>] __wait_on_freeing_inode+0x9e/0xc0 <<< waiting for an inode to go away [<ffffffff81183321>] find_inode_fast+0xa1/0xc0 [<ffffffff8118525f>] iget_locked+0x4f/0x180 [<ffffffff811ef9e3>] ext4_iget+0x33/0x9f0 [<ffffffff811f6a1c>] ext4_lookup+0xbc/0x160 [<ffffffff81174ad0>] lookup_real+0x20/0x60 [<ffffffff81177e25>] lookup_open+0x175/0x1d0 [<ffffffff8117815e>] do_last+0x2de/0x780 <<< holds i_mutex [<ffffffff8117ae9a>] path_openat+0xda/0x400 [<ffffffff8117b303>] do_filp_open+0x43/0xa0 [<ffffffff81168ee0>] do_sys_open+0x160/0x1e0 [<ffffffff81168f9c>] sys_open+0x1c/0x20 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 11214 [<ffffffff81178144>] do_last+0x2c4/0x780 <<< blocked on i_mutex [<ffffffff8117ae9a>] path_openat+0xda/0x400 [<ffffffff8117b303>] do_filp_open+0x43/0xa0 [<ffffffff81168ee0>] do_sys_open+0x160/0x1e0 [<ffffffff81168f9c>] sys_open+0x1c/0x20 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 11217 [<ffffffff81178144>] do_last+0x2c4/0x780 <<< blocked on i_mutex [<ffffffff8117ae9a>] path_openat+0xda/0x400 [<ffffffff8117b303>] do_filp_open+0x43/0xa0 [<ffffffff81168ee0>] do_sys_open+0x160/0x1e0 [<ffffffff81168f9c>] sys_open+0x1c/0x20 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 11288 [<ffffffff81178144>] do_last+0x2c4/0x780 <<< blocked on i_mutex [<ffffffff8117ae9a>] path_openat+0xda/0x400 [<ffffffff8117b303>] do_filp_open+0x43/0xa0 [<ffffffff81168ee0>] do_sys_open+0x160/0x1e0 [<ffffffff81168f9c>] sys_open+0x1c/0x20 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 11453 [<ffffffff8118325e>] __wait_on_freeing_inode+0x9e/0xc0 [<ffffffff81183321>] find_inode_fast+0xa1/0xc0 [<ffffffff8118525f>] iget_locked+0x4f/0x180 [<ffffffff811ef9e3>] ext4_iget+0x33/0x9f0 [<ffffffff811f6a1c>] ext4_lookup+0xbc/0x160 [<ffffffff81174ad0>] lookup_real+0x20/0x60 [<ffffffff81177e25>] lookup_open+0x175/0x1d0 [<ffffffff8117815e>] do_last+0x2de/0x780 [<ffffffff8117ae9a>] path_openat+0xda/0x400 [<ffffffff8117b303>] do_filp_open+0x43/0xa0 [<ffffffff81168ee0>] do_sys_open+0x160/0x1e0 [<ffffffff81168f9c>] sys_open+0x1c/0x20 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 12439 [<ffffffff8118325e>] __wait_on_freeing_inode+0x9e/0xc0 [<ffffffff81183321>] find_inode_fast+0xa1/0xc0 [<ffffffff8118525f>] iget_locked+0x4f/0x180 [<ffffffff811ef9e3>] ext4_iget+0x33/0x9f0 [<ffffffff811f6a1c>] ext4_lookup+0xbc/0x160 [<ffffffff81174ad0>] lookup_real+0x20/0x60 [<ffffffff81175254>] __lookup_hash+0x34/0x40 [<ffffffff81179872>] path_lookupat+0x7a2/0x830 [<ffffffff81179933>] filename_lookup+0x33/0xd0 [<ffffffff8117ab0b>] user_path_at_empty+0x7b/0xb0 [<ffffffff8117ab4c>] user_path_at+0xc/0x10 [<ffffffff8116ff91>] vfs_fstatat+0x51/0xb0 [<ffffffff81170116>] vfs_stat+0x16/0x20 [<ffffffff8117013f>] sys_newstat+0x1f/0x50 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 12542 [<ffffffff81179862>] path_lookupat+0x792/0x830 [<ffffffff81179933>] filename_lookup+0x33/0xd0 [<ffffffff8117ab0b>] user_path_at_empty+0x7b/0xb0 [<ffffffff8117ab4c>] user_path_at+0xc/0x10 [<ffffffff8116ff91>] vfs_fstatat+0x51/0xb0 [<ffffffff81170116>] vfs_stat+0x16/0x20 [<ffffffff8117013f>] sys_newstat+0x1f/0x50 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 12588 [<ffffffff81179862>] path_lookupat+0x792/0x830 [<ffffffff81179933>] filename_lookup+0x33/0xd0 [<ffffffff8117ab0b>] user_path_at_empty+0x7b/0xb0 [<ffffffff8117ab4c>] user_path_at+0xc/0x10 [<ffffffff8116ff91>] vfs_fstatat+0x51/0xb0 [<ffffffff81170116>] vfs_stat+0x16/0x20 [<ffffffff8117013f>] sys_newstat+0x1f/0x50 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 12589 [<ffffffff81179862>] path_lookupat+0x792/0x830 [<ffffffff81179933>] filename_lookup+0x33/0xd0 [<ffffffff8117ab0b>] user_path_at_empty+0x7b/0xb0 [<ffffffff8117ab4c>] user_path_at+0xc/0x10 [<ffffffff8116ff91>] vfs_fstatat+0x51/0xb0 [<ffffffff81170116>] vfs_stat+0x16/0x20 [<ffffffff8117013f>] sys_newstat+0x1f/0x50 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 13098 [<ffffffff8118325e>] __wait_on_freeing_inode+0x9e/0xc0 [<ffffffff81183321>] find_inode_fast+0xa1/0xc0 [<ffffffff8118525f>] iget_locked+0x4f/0x180 [<ffffffff811ef9e3>] ext4_iget+0x33/0x9f0 [<ffffffff811f6a1c>] ext4_lookup+0xbc/0x160 [<ffffffff81174ad0>] lookup_real+0x20/0x60 [<ffffffff81177e25>] lookup_open+0x175/0x1d0 [<ffffffff8117815e>] do_last+0x2de/0x780 [<ffffffff8117ae9a>] path_openat+0xda/0x400 [<ffffffff8117b303>] do_filp_open+0x43/0xa0 [<ffffffff81168ee0>] do_sys_open+0x160/0x1e0 [<ffffffff81168f9c>] sys_open+0x1c/0x20 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 19091 [<ffffffff81179862>] path_lookupat+0x792/0x830 [<ffffffff81179933>] filename_lookup+0x33/0xd0 [<ffffffff8117ab0b>] user_path_at_empty+0x7b/0xb0 [<ffffffff8117ab4c>] user_path_at+0xc/0x10 [<ffffffff8116ff91>] vfs_fstatat+0x51/0xb0 [<ffffffff81170116>] vfs_stat+0x16/0x20 [<ffffffff8117013f>] sys_newstat+0x1f/0x50 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff 19092 [<ffffffff81179862>] path_lookupat+0x792/0x830 [<ffffffff81179933>] filename_lookup+0x33/0xd0 [<ffffffff8117ab0b>] user_path_at_empty+0x7b/0xb0 [<ffffffff8117ab4c>] user_path_at+0xc/0x10 [<ffffffff8116ff91>] vfs_fstatat+0x51/0xb0 [<ffffffff81170116>] vfs_stat+0x16/0x20 [<ffffffff8117013f>] sys_newstat+0x1f/0x50 [<ffffffff81582fe9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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