On 2021/4/26 10:11, Fengnan Chang wrote:
when write compressed file with O_TRUNC, there will be a lot of
unnecessary check valid blocks in f2fs_prepare_compress_overwrite,
especially when written in page size, remove it.
Signed-off-by: Fengnan Chang <changfeng...@vivo.com>
---
fs/f2fs/data.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index cf935474ffba..9c3b0849f35e 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -3270,6 +3270,7 @@ static int f2fs_write_begin(struct file *file, struct
address_space *mapping,
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct page *page = NULL;
pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
+ pgoff_t end = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT;
Should define this under compression macro, otherwise it may cause compile
warning.
bool need_balance = false, drop_atomic = false;
block_t blkaddr = NULL_ADDR;
int err = 0;
@@ -3306,6 +3307,9 @@ static int f2fs_write_begin(struct file *file, struct
address_space *mapping,
*fsdata = NULL;
+ if (index >= end)
+ goto repeat;
+
ret = f2fs_prepare_compress_overwrite(inode, pagep,
index, fsdata);
if (ret < 0) {
--
2.29.0
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