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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-02-09 10:38:09 -0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-13 12:35:00 +0200 |
| commit | 5430376f3530918846c4a4be01d1fde7ccb33db3 (patch) | |
| tree | 14f8c6ce877a5e7debc1dea6f9682a9b0ea82711 /fs/f2fs/segment.c | |
| parent | 1171f2746938a40ea8ac186d6b4a980c00e2576d (diff) | |
| download | android_kernel_m2note-5430376f3530918846c4a4be01d1fde7ccb33db3.tar.gz | |
f2fs: add bitmaps for empty or full NAT blocks
This patches adds bitmaps to represent empty or full NAT blocks containing
free nid entries.
If we can find valid crc|cp_ver in the last block of checkpoint pack, we'll
use these bitmaps when building free nids. In order to avoid checkpointing
burden, up-to-date bitmaps will be flushed only during umount time. So,
normally we can get this gain, but when power-cut happens, we rely on fsck.f2fs
which recovers this bitmap again.
After this patch, we build free nids from nid #0 at mount time to make more
full NAT blocks, but in runtime, we check empty NAT blocks to load free nids
without loading any NAT pages from disk.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.c')
| -rw-r--r-- | fs/f2fs/segment.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 118e9795e..71347ab2e 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -445,7 +445,7 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi) if (!available_free_memory(sbi, FREE_NIDS)) try_to_free_nids(sbi, MAX_FREE_NIDS); else - build_free_nids(sbi, false); + build_free_nids(sbi, false, false); if (!is_idle(sbi)) return; |