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| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-05-20 16:15:22 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-05-28 15:03:03 +0900 |
| commit | 6f85b3520325a67ee4ac33e75bbcdbc25c79ce69 (patch) | |
| tree | 9d74bde977a13340142d9a2e3f03f122f11b12a7 /fs/f2fs/data.c | |
| parent | 2c2c149f7dabd5a4d41cae5d2c2ce1d130acf72c (diff) | |
| download | linux-6f85b3520325a67ee4ac33e75bbcdbc25c79ce69.tar.gz linux-6f85b3520325a67ee4ac33e75bbcdbc25c79ce69.tar.bz2 linux-6f85b3520325a67ee4ac33e75bbcdbc25c79ce69.zip | |
f2fs: avoid RECLAIM_FS-ON-W: deadlock
This patch tries to avoid the following deadlock condition of which the reclaim
path can trigger f2fs_balance_fs again.
=================================
[ INFO: inconsistent lock state ]
---------------------------------
inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} usage.
kswapd0/41 [HC0[0]:SC0[0]:HE1:SE1] takes:
(&sbi->gc_mutex){+.+.?.}, at: f2fs_balance_fs+0xe6/0x100 [f2fs]
{RECLAIM_FS-ON-W} state was registered at:
[<ffffffff810aa5a9>] mark_held_locks+0xb9/0x140
[<ffffffff810aae85>] lockdep_trace_alloc+0x85/0xf0
[<ffffffff8113ab2c>] __alloc_pages_nodemask+0x7c/0x9b0
[<ffffffff81175aa8>] alloc_pages_current+0xb8/0x180
[<ffffffff811319cf>] __page_cache_alloc+0xaf/0xd0
[<ffffffff8113225c>] find_or_create_page+0x4c/0xb0
[<ffffffffa021359e>] find_data_page+0x14e/0x210 [f2fs]
[<ffffffffa021161b>] f2fs_gc+0x9eb/0xd90 [f2fs]
[<ffffffffa0218fae>] f2fs_balance_fs+0xee/0x100 [f2fs]
[<ffffffffa020848c>] f2fs_setattr+0x6c/0x200 [f2fs]
[<ffffffff811ae51b>] notify_change+0x1db/0x3a0
[<ffffffff8118fbd0>] do_truncate+0x60/0xa0
[<ffffffff8118fd95>] vfs_truncate+0x185/0x1b0
[<ffffffff8118fe1c>] do_sys_truncate+0x5c/0xa0
[<ffffffff8118ffee>] SyS_truncate+0xe/0x10
[<ffffffff816e2b42>] system_call_fastpath+0x16/0x1b
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/data.c')
| -rw-r--r-- | fs/f2fs/data.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index c320f7f31327..1644fffea251 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -199,7 +199,7 @@ struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) if (dn.data_blkaddr == NEW_ADDR) return ERR_PTR(-EINVAL); - page = grab_cache_page(mapping, index); + page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); if (!page) return ERR_PTR(-ENOMEM); @@ -234,7 +234,7 @@ struct page *get_lock_data_page(struct inode *inode, pgoff_t index) int err; repeat: - page = grab_cache_page(mapping, index); + page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); if (!page) return ERR_PTR(-ENOMEM); |