* [f2fs-dev] [PATCH v3] f2fs: compress: avoid unnecessary check in f2fs_prepare_compress_overwrite
@ 2021-05-06 1:52 Fengnan Chang
0 siblings, 0 replies; only message in thread
From: Fengnan Chang @ 2021-05-06 1:52 UTC (permalink / raw)
To: jaegeuk, chao, linux-f2fs-devel; +Cc: Fengnan Chang
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 <changfengnan@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..8ce26decf382 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -3303,9 +3303,13 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
#ifdef CONFIG_F2FS_FS_COMPRESSION
if (f2fs_compressed_file(inode)) {
int ret;
+ pgoff_t end = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT;
*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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