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| author | Haicheng Li <haicheng.li@linux.intel.com> | 2013-05-06 23:15:41 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-05-08 19:54:20 +0900 |
| commit | 95630cbadc3588abff24a4b1989b72c943b27512 (patch) | |
| tree | 9655200dfab3fb8efa94dfb84c1ff7fb9b451e64 /fs/f2fs | |
| parent | 047184b42b52376f4066f9ab357c0a61a12f116e (diff) | |
| download | linux-stable-95630cbadc3588abff24a4b1989b72c943b27512.tar.gz linux-stable-95630cbadc3588abff24a4b1989b72c943b27512.tar.bz2 linux-stable-95630cbadc3588abff24a4b1989b72c943b27512.zip | |
f2fs: bugfix for alloc_nid_failed()
Directly drop the free_nid cache when nm_i->fcnt > 2 * MAX_FREE_NIDS
Since there is NOT nmi->free_nid_list_lock spinlock protection between
a sequential calling of alloc_nid() and alloc_nid_failed(), some other
threads may already add new free_nid to the free_nid_list during this
period.
We need to make sure nmi->fcnt is never > 2 * MAX_FREE_NIDS.
Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com>
[Jaegeuk Kim: fit the coding style]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/node.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 7209d637f942..d682f34ee0f8 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1439,8 +1439,12 @@ void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) spin_lock(&nm_i->free_nid_list_lock); i = __lookup_free_nid_list(nid, &nm_i->free_nid_list); BUG_ON(!i || i->state != NID_ALLOC); - i->state = NID_NEW; - nm_i->fcnt++; + if (nm_i->fcnt > 2 * MAX_FREE_NIDS) { + __del_from_free_nid_list(i); + } else { + i->state = NID_NEW; + nm_i->fcnt++; + } spin_unlock(&nm_i->free_nid_list_lock); } |