Sheng Yong a09881cfb7 f2fs: avoid hungtask when GC encrypted block if io_bits is set ... [ Upstream commit a9d572c755 ] When io_bits is set, GCing encrypted block may hit the following hungtask. Since io_bits requires aligned block address, f2fs_submit_page_write may return -EAGAIN if new_blkaddr does not satisify io_bits alignment. As a result, the encrypted page will never be writtenback. This patch makes move_data_block aware the EAGAIN error and cancel the writeback. [ 246.751371] INFO: task kworker/u4:4:797 blocked for more than 90 seconds. [ 246.752423] Not tainted 4.15.0-rc4+ #11 [ 246.754176] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 246.755336] kworker/u4:4 D25448 797 2 0x80000000 [ 246.755597] Workqueue: writeback wb_workfn (flush-7:0) [ 246.755616] Call Trace: [ 246.755695] ? __schedule+0x322/0xa90 [ 246.755761] ? blk_init_request_from_bio+0x120/0x120 [ 246.755773] ? pci_mmcfg_check_reserved+0xb0/0xb0 [ 246.755801] ? __radix_tree_create+0x19e/0x200 [ 246.755813] ? delete_node+0x136/0x370 [ 246.755838] schedule+0x43/0xc0 [ 246.755904] io_schedule+0x17/0x40 [ 246.755939] wait_on_page_bit_common+0x17b/0x240 [ 246.755950] ? wake_page_function+0xa0/0xa0 [ 246.755961] ? add_to_page_cache_lru+0x160/0x160 [ 246.755972] ? page_cache_tree_insert+0x170/0x170 [ 246.755983] ? __lru_cache_add+0x96/0xb0 [ 246.756086] __filemap_fdatawait_range+0x14f/0x1c0 [ 246.756097] ? wait_on_page_bit_common+0x240/0x240 [ 246.756120] ? __wake_up_locked_key_bookmark+0x20/0x20 [ 246.756167] ? wait_on_all_pages_writeback+0xc9/0x100 [ 246.756179] ? __remove_ino_entry+0x120/0x120 [ 246.756192] ? wait_woken+0x100/0x100 [ 246.756204] filemap_fdatawait_range+0x9/0x20 [ 246.756216] write_checkpoint+0x18a1/0x1f00 [ 246.756254] ? blk_get_request+0x10/0x10 [ 246.756265] ? cpumask_next_and+0x43/0x60 [ 246.756279] ? f2fs_sync_inode_meta+0x160/0x160 [ 246.756289] ? remove_element.isra.4+0xa0/0xa0 [ 246.756300] ? __put_compound_page+0x40/0x40 [ 246.756310] ? f2fs_sync_fs+0xec/0x1c0 [ 246.756320] ? f2fs_sync_fs+0x120/0x1c0 [ 246.756329] f2fs_sync_fs+0x120/0x1c0 [ 246.756357] ? trace_event_raw_event_f2fs__page+0x260/0x260 [ 246.756393] ? ata_build_rw_tf+0x173/0x410 [ 246.756397] f2fs_balance_fs_bg+0x198/0x390 [ 246.756405] ? drop_inmem_page+0x230/0x230 [ 246.756415] ? ahci_qc_prep+0x1bb/0x2e0 [ 246.756418] ? ahci_qc_issue+0x1df/0x290 [ 246.756422] ? __accumulate_pelt_segments+0x42/0xd0 [ 246.756426] ? f2fs_write_node_pages+0xd1/0x380 [ 246.756429] f2fs_write_node_pages+0xd1/0x380 [ 246.756437] ? sync_node_pages+0x8f0/0x8f0 [ 246.756440] ? update_curr+0x53/0x220 [ 246.756444] ? __accumulate_pelt_segments+0xa2/0xd0 [ 246.756448] ? __update_load_avg_se.isra.39+0x349/0x360 [ 246.756452] ? do_writepages+0x2a/0xa0 [ 246.756456] do_writepages+0x2a/0xa0 [ 246.756460] __writeback_single_inode+0x70/0x490 [ 246.756463] ? check_preempt_wakeup+0x199/0x310 [ 246.756467] writeback_sb_inodes+0x2a2/0x660 [ 246.756471] ? is_empty_dir_inode+0x40/0x40 [ 246.756474] ? __writeback_single_inode+0x490/0x490 [ 246.756477] ? string+0xbf/0xf0 [ 246.756480] ? down_read_trylock+0x35/0x60 [ 246.756484] __writeback_inodes_wb+0x9f/0xf0 [ 246.756488] wb_writeback+0x41d/0x4b0 [ 246.756492] ? writeback_inodes_wb.constprop.55+0x150/0x150 [ 246.756498] ? set_worker_desc+0xf7/0x130 [ 246.756502] ? current_is_workqueue_rescuer+0x60/0x60 [ 246.756511] ? _find_next_bit+0x2c/0xa0 [ 246.756514] ? wb_workfn+0x400/0x5d0 [ 246.756518] wb_workfn+0x400/0x5d0 [ 246.756521] ? finish_task_switch+0xdf/0x2a0 [ 246.756525] ? inode_wait_for_writeback+0x30/0x30 [ 246.756529] process_one_work+0x3a7/0x6f0 [ 246.756533] worker_thread+0x82/0x750 [ 246.756537] kthread+0x16f/0x1c0 [ 246.756541] ? trace_event_raw_event_workqueue_work+0x110/0x110 [ 246.756544] ? kthread_create_worker_on_cpu+0xb0/0xb0 [ 246.756548] ret_from_fork+0x1f/0x30 Signed-off-by: Sheng Yong <shengyong1@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-04-26 11:02:09 +02:00
..
Kconfig	f2fs: add mount option to select fault injection ratio	2016-05-07 10:32:22 -07:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
acl.c	f2fs: preserve i_mode if __f2fs_set_acl() fails	2017-07-28 17:48:54 -07:00
acl.h	f2fs: remove dead code f2fs_check_acl	2016-09-14 16:52:36 -07:00
checkpoint.c	f2fs: support journalled quota	2017-08-21 15:54:48 -07:00
data.c	for-f2fs-4.14	2017-09-12 20:05:58 -07:00
debug.c	f2fs: show available_nids in f2fs/status	2017-05-03 10:04:57 -07:00
dir.c	f2fs: clear radix tree dirty tag of pages whose dirty flag is cleared	2017-09-11 21:32:38 -07:00
extent_cache.c	f2fs: fix a bug caused by NULL extent tree	2017-05-23 21:07:18 -07:00
f2fs.h	f2fs: fix potential panic during fstrim	2017-10-03 08:06:05 -07:00
file.c	f2fs: fix to clear FI_NO_PREALLOC	2017-12-14 09:53:14 +01:00
gc.c	f2fs: avoid hungtask when GC encrypted block if io_bits is set	2018-04-26 11:02:09 +02:00
gc.h	f2fs: fix potential overflow when adjusting GC cycle	2017-08-15 10:40:14 -07:00
hash.c	f2fs: check entire encrypted bigname when finding a dentry	2017-05-04 11:44:35 -04:00
inline.c	f2fs: clear radix tree dirty tag of pages whose dirty flag is cleared	2017-09-11 21:32:38 -07:00
inode.c	f2fs: detect dirty inode in evict_inode	2017-09-12 10:02:39 -07:00
namei.c	f2fs: update i_flags correctly	2017-09-05 10:50:21 -07:00
node.c	f2fs: don't check inode's checksum if it was dirtied or writebacked	2017-09-05 10:50:11 -07:00
node.h	f2fs: simplify the way of calulating next nat address	2017-07-04 02:11:34 -07:00
recovery.c	f2fs: check hot_data for roll-forward recovery	2017-08-21 15:55:06 -07:00
segment.c	f2fs: fix heap mode to reset it back	2018-04-19 08:56:20 +02:00
segment.h	f2fs: speed up gc_urgent mode with SSR	2017-09-11 17:22:18 -07:00
shrinker.c	f2fs: avoid casted negative value as shrink count	2016-11-23 12:11:03 -08:00
super.c	f2fs: fix potential panic during fstrim	2017-10-03 08:06:05 -07:00
sysfs.c	f2fs: fix to show correct discard_granularity in sysfs	2017-09-12 10:02:47 -07:00
trace.c	f2fs: use set_page_private marcro in f2fs_trace_pid	2017-03-24 15:10:49 -04:00
trace.h	f2fs: add sbi and page pointer in f2fs_io_info	2015-05-28 15:41:32 -07:00
xattr.c	f2fs: avoid race in between read xattr & write xattr	2017-09-07 20:57:20 -07:00
xattr.h	f2fs: guard macro variables with braces	2017-04-10 19:48:10 -07:00