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>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 509a2c4..1f12004 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -514,7 +514,7 @@
return blkdev_issue_discard(sbi->sb->s_bdev, start, len, GFP_NOFS, 0);
}
-void discard_next_dnode(struct f2fs_sb_info *sbi, block_t blkaddr)
+bool discard_next_dnode(struct f2fs_sb_info *sbi, block_t blkaddr)
{
int err = -ENOTSUPP;
@@ -524,13 +524,16 @@
unsigned int offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
if (f2fs_test_bit(offset, se->discard_map))
- return;
+ return false;
err = f2fs_issue_discard(sbi, blkaddr, 1);
}
- if (err)
+ if (err) {
update_meta_page(sbi, NULL, blkaddr);
+ return true;
+ }
+ return false;
}
static void __add_discard_entry(struct f2fs_sb_info *sbi,