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| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-10-24 13:31:34 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-10-25 16:54:37 +0900 |
| commit | 81eb8d6e2869b119d4a7b8c02091c3779733a3ac (patch) | |
| tree | cdff776596fa79bfc9c2f2baf7aa59470dc29aec /fs/f2fs/node.c | |
| parent | aabe51364f44681cbd83fb1c27ef7d3dbe567c45 (diff) | |
| download | linux-81eb8d6e2869b119d4a7b8c02091c3779733a3ac.tar.gz linux-81eb8d6e2869b119d4a7b8c02091c3779733a3ac.tar.bz2 linux-81eb8d6e2869b119d4a7b8c02091c3779733a3ac.zip | |
f2fs: reclaim prefree segments periodically
Previously, f2fs postpones reclaiming prefree segments into free segments
as much as possible.
However, if user writes and deletes a bunch of data without any sync or fsync
calls, some flash storages can suffer from garbage collections.
So, this patch adds the reclaiming codes to f2fs_write_node_pages and background
GC thread.
If there are a lot of prefree segments, let's do checkpoint so that f2fs
submits discard commands for the prefree regions to the flash storage.
Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/node.c')
| -rw-r--r-- | fs/f2fs/node.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index cc119b65a0d3..89dd8a5a3ca3 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1206,7 +1206,8 @@ static int f2fs_write_node_pages(struct address_space *mapping, long nr_to_write = wbc->nr_to_write; /* First check balancing cached NAT entries */ - if (try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK)) { + if (try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK) || + excess_prefree_segs(sbi)) { f2fs_sync_fs(sbi->sb, true); return 0; } |