diff options
| author | Chao Yu <chao2.yu@samsung.com> | 2015-07-28 13:36:47 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-08-05 18:19:21 +0300 |
| commit | e90c2d2850d9d034e814a328725a4b15878f0357 (patch) | |
| tree | b9709c15f56af0c3d76dd717033a1e08e25ac2ee /fs/f2fs/checkpoint.c | |
| parent | 470f00e9686f0b338a457568229fe7b7d44b8e6a (diff) | |
| download | linux-e90c2d2850d9d034e814a328725a4b15878f0357.tar.xz | |
f2fs: invalidate temporary meta page
To avoid meeting garbage data in next free node block at the end of warm
node chain when doing recovery, we will try to zero out that invalid block.
If the device is not support discard, our way for zeroing out block is:
grabbing a temporary zeroed page in meta inode, then, issue write request
with this page.
But, we forget to release that temporary page, so our memory usage will
increase without gaining any hit ratio benefit, so it's better to free it
for saving memory.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/checkpoint.c')
| -rw-r--r-- | fs/f2fs/checkpoint.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 9c1acf69bfbb..c3111769d382 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -896,12 +896,15 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) __u32 crc32 = 0; int i; int cp_payload_blks = __cp_payload(sbi); + block_t discard_blk = NEXT_FREE_BLKADDR(sbi, curseg); + bool invalidate = false; /* * This avoids to conduct wrong roll-forward operations and uses * metapages, so should be called prior to sync_meta_pages below. */ - discard_next_dnode(sbi, NEXT_FREE_BLKADDR(sbi, curseg)); + if (discard_next_dnode(sbi, discard_blk)) + invalidate = true; /* Flush all the NAT/SIT pages */ while (get_pages(sbi, F2FS_DIRTY_META)) { @@ -1030,6 +1033,14 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) /* wait for previous submitted meta pages writeback */ wait_on_all_pages_writeback(sbi); + /* + * invalidate meta page which is used temporarily for zeroing out + * block at the end of warm node chain. + */ + if (invalidate) + invalidate_mapping_pages(META_MAPPING(sbi), discard_blk, + discard_blk); + release_dirty_inode(sbi); if (unlikely(f2fs_cp_error(sbi))) |