Jaegeuk Kim 83def43454 f2fs: should use GFP_NOFS for directory inodes ... commit 92d602bc7177325e7453189a22e0c8764ed3453e upstream. We use inline_dentry which requires to allocate dentry page when adding a link. If we allow to reclaim memory from filesystem, we do down_read(&sbi->cp_rwsem) twice by f2fs_lock_op(). I think this should be okay, but how about stopping the lockdep complaint [1]? f2fs_create() - f2fs_lock_op() - f2fs_do_add_link() - __f2fs_find_entry - f2fs_get_read_data_page() -> kswapd - shrink_node - f2fs_evict_inode - f2fs_lock_op() [1] fs_reclaim ){+.+.}-{0:0} : kswapd0: lock_acquire+0x114/0x394 kswapd0: __fs_reclaim_acquire+0x40/0x50 kswapd0: prepare_alloc_pages+0x94/0x1ec kswapd0: __alloc_pages_nodemask+0x78/0x1b0 kswapd0: pagecache_get_page+0x2e0/0x57c kswapd0: f2fs_get_read_data_page+0xc0/0x394 kswapd0: f2fs_find_data_page+0xa4/0x23c kswapd0: find_in_level+0x1a8/0x36c kswapd0: __f2fs_find_entry+0x70/0x100 kswapd0: f2fs_do_add_link+0x84/0x1ec kswapd0: f2fs_mkdir+0xe4/0x1e4 kswapd0: vfs_mkdir+0x110/0x1c0 kswapd0: do_mkdirat+0xa4/0x160 kswapd0: __arm64_sys_mkdirat+0x24/0x34 kswapd0: el0_svc_common.llvm.17258447499513131576+0xc4/0x1e8 kswapd0: do_el0_svc+0x28/0xa0 kswapd0: el0_svc+0x24/0x38 kswapd0: el0_sync_handler+0x88/0xec kswapd0: el0_sync+0x1c0/0x200 kswapd0: -> #1 ( &sbi->cp_rwsem ){++++}-{3:3} : kswapd0: lock_acquire+0x114/0x394 kswapd0: down_read+0x7c/0x98 kswapd0: f2fs_do_truncate_blocks+0x78/0x3dc kswapd0: f2fs_truncate+0xc8/0x128 kswapd0: f2fs_evict_inode+0x2b8/0x8b8 kswapd0: evict+0xd4/0x2f8 kswapd0: iput+0x1c0/0x258 kswapd0: do_unlinkat+0x170/0x2a0 kswapd0: __arm64_sys_unlinkat+0x4c/0x68 kswapd0: el0_svc_common.llvm.17258447499513131576+0xc4/0x1e8 kswapd0: do_el0_svc+0x28/0xa0 kswapd0: el0_svc+0x24/0x38 kswapd0: el0_sync_handler+0x88/0xec kswapd0: el0_sync+0x1c0/0x200 Cc: stable@vger.kernel.org Fixes: bdbc90fa55 ("f2fs: don't put dentry page in pagecache into highmem") Reviewed-by: Chao Yu <chao@kernel.org> Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Reviewed-by: Light Hsieh <light.hsieh@mediatek.com> Tested-by: Light Hsieh <light.hsieh@mediatek.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-11-26 11:36:17 +01:00
..
acl.c	f2fs: fix wrong return value of f2fs_acl_create	2019-02-12 19:47:02 +01:00
acl.h
checkpoint.c	f2fs: fix to check segment boundary during SIT page readahead	2020-11-05 11:08:39 +01:00
data.c	f2fs: Return EOF on unaligned end of file DIO read	2020-09-23 12:10:59 +02:00
debug.c	f2fs: don't access node/meta inode mapping after iput	2019-07-10 09:53:45 +02:00
dir.c	f2fs: fix uninit-value in f2fs_lookup	2020-11-05 11:08:39 +01:00
extent_cache.c	f2fs: avoid sleeping under spin_lock	2018-11-13 11:08:37 -08:00
f2fs.h	f2fs: prevent creating duplicate encrypted filenames	2021-01-06 14:44:58 +01:00
file.c	f2fs: fix to unmap pages from userspace process in punch_hole()	2021-09-22 11:48:02 +02:00
gc.c	f2fs: fix to account missing .skipped_gc_rwsem	2021-09-22 11:48:02 +02:00
gc.h	f2fs: introduce sbi->gc_mode to determine the policy	2018-05-31 11:31:51 -07:00
hash.c	f2fs: check entire encrypted bigname when finding a dentry	2017-05-04 11:44:35 -04:00
inline.c	f2fs: fix a redundant call to f2fs_balance_fs if an error occurs	2021-05-22 10:59:42 +02:00
inode.c	f2fs: should use GFP_NOFS for directory inodes	2021-11-26 11:36:17 +01:00
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: should use GFP_NOFS for directory inodes	2021-11-26 11:36:17 +01:00
node.c	f2fs: fix to avoid out-of-bounds memory access	2021-05-22 10:59:19 +02:00
node.h	f2fs: let checkpoint flush dnode page of regular	2018-08-01 11:52:36 -07:00
recovery.c	f2fs: fix error path in do_recover_data()	2020-09-03 11:24:20 +02:00
segment.c	f2fs: fix to account preflush command for noflush_merge mode	2019-12-13 08:51:48 +01:00
segment.h	f2fs: handle unallocated section and zone on pinned/atgc	2021-03-07 12:18:59 +01:00
shrinker.c	f2fs: fix sbi->extent_list corruption issue	2019-02-12 19:47:17 +01:00
super.c	f2fs: add MODULE_SOFTDEP to ensure crc32 is included in the initramfs	2021-07-20 16:16:12 +02:00
sysfs.c	f2fs: wait for sysfs kobject removal before freeing f2fs_sb_info	2020-10-30 10:38:20 +01:00
trace.c	f2fs: do not use mutex lock in atomic context	2019-04-05 22:32:59 +02:00
trace.h
xattr.c	f2fs: fix to avoid memory leakage in f2fs_listxattr	2020-04-29 16:31:17 +02:00
xattr.h	f2fs: fix to avoid accessing xattr across the boundary	2019-06-19 08:18:02 +02:00