Ritesh Harjani 02117b8ae9 f2fs: Set GF_NOFS in read_cache_page_gfp while doing f2fs_quota_read ... Quota code itself is serializing the operations by taking mutex_lock. It seems a below deadlock can happen if GF_NOFS is not used in f2fs_quota_read __switch_to+0x88 __schedule+0x5b0 schedule+0x78 schedule_preempt_disabled+0x20 __mutex_lock_slowpath+0xdc //mutex owner is itself mutex_lock+0x2c dquot_commit+0x30 //mutex_lock(&dqopt->dqio_mutex); dqput+0xe0 __dquot_drop+0x80 dquot_drop+0x48 f2fs_evict_inode+0x218 evict+0xa8 dispose_list+0x3c prune_icache_sb+0x58 super_cache_scan+0xf4 do_shrink_slab+0x208 shrink_slab.part.40+0xac shrink_zone+0x1b0 do_try_to_free_pages+0x25c try_to_free_pages+0x164 __alloc_pages_nodemask+0x534 do_read_cache_page+0x6c read_cache_page+0x14 f2fs_quota_read+0xa4 read_blk+0x54 find_tree_dqentry+0xe4 find_tree_dqentry+0xb8 find_tree_dqentry+0xb8 find_tree_dqentry+0xb8 qtree_read_dquot+0x68 v2_read_dquot+0x24 dquot_acquire+0x5c // mutex_lock(&dqopt->dqio_mutex); dqget+0x238 __dquot_initialize+0xd4 dquot_initialize+0x10 dquot_file_open+0x34 f2fs_file_open+0x6c do_dentry_open+0x1e4 vfs_open+0x6c path_openat+0xa20 do_filp_open+0x4c do_sys_open+0x178 Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>		2018-03-18 23:31:28 -07:00
..
acl.c	posix_acl: convert posix_acl.a_refcount from atomic_t to refcount_t	2018-01-02 19:27:28 -08:00
acl.h	f2fs: remove dead code f2fs_check_acl	2016-09-14 16:52:36 -07:00
checkpoint.c	f2fs: flush cp pack except cp pack 2 page at first	2018-03-13 08:05:43 +09:00
data.c	f2fs: add nowait aio support	2018-03-17 13:57:32 +09:00
debug.c	f2fs: inject fault to kzalloc	2018-01-02 19:27:29 -08:00
dir.c	f2fs: introduce a new mount option test_dummy_encryption	2018-03-17 14:02:57 +09:00
extent_cache.c	f2fs: remove redundant initialization of pointer 'p'	2018-03-13 08:05:45 +09:00
f2fs.h	f2fs: introduce a new mount option test_dummy_encryption	2018-03-17 14:02:57 +09:00
file.c	f2fs: release locks before return in f2fs_ioc_gc_range()	2018-03-17 13:58:16 +09:00
gc.c	f2fs: do gc in greedy mode for whole range if gc_urgent mode is set	2018-03-13 08:05:54 +09:00
gc.h	f2fs: add an ioctl to disable GC for specific file	2018-01-22 14:56:35 -08:00
hash.c	f2fs: check entire encrypted bigname when finding a dentry	2017-05-04 11:44:35 -04:00
inline.c	f2fs: don't put dentry page in pagecache into highmem	2018-03-13 08:05:03 +09:00
inode.c	f2fs: remove unneeded set_cold_node()	2018-03-17 13:57:33 +09:00
Kconfig	fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at	2018-01-01 12:45:37 -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
namei.c	f2fs: introduce a new mount option test_dummy_encryption	2018-03-17 14:02:57 +09:00
node.c	f2fs: align memory boundary for bitops	2018-03-17 13:57:39 +09:00
node.h	f2fs: remove unneeded set_cold_node()	2018-03-17 13:57:33 +09:00
recovery.c	f2fs: fix to handle looped node chain during recovery	2018-03-13 08:05:40 +09:00
segment.c	f2fs: wrap all options with f2fs_sb_info.mount_opt	2018-03-17 13:57:30 +09:00
segment.h	f2fs: add auto tuning for small devices	2018-03-13 08:05:51 +09:00
shrinker.c	f2fs: obsolete ALLOC_NID_LIST list	2017-10-10 12:49:53 -07:00
super.c	f2fs: Set GF_NOFS in read_cache_page_gfp while doing f2fs_quota_read	2018-03-18 23:31:28 -07:00
sysfs.c	f2fs: introduce F2FS_FEATURE_LOST_FOUND feature	2018-03-17 14:02:47 +09:00
trace.c	f2fs: fix potential hangtask in f2fs_trace_pid	2018-01-02 19:27:30 -08:00
trace.h	f2fs: add sbi and page pointer in f2fs_io_info	2015-05-28 15:41:32 -07:00
xattr.c	f2fs: correct removexattr behavior for null valued extended attribute	2018-01-22 14:56:57 -08:00
xattr.h	f2fs: guard macro variables with braces	2017-04-10 19:48:10 -07:00