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| author | Chao Yu <yuchao0@huawei.com> | 2018-04-09 14:25:06 +0200 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-05-31 20:31:45 +0200 |
| commit | 81114baa835b59ed02d14aa1d67f91ea874077cd (patch) | |
| tree | eded000624ab09f8f101120b54798527b60acb54 /fs/f2fs/segment.h | |
| parent | f2fs: issue all big range discards in umount process (diff) | |
| download | linux-81114baa835b59ed02d14aa1d67f91ea874077cd.tar.xz linux-81114baa835b59ed02d14aa1d67f91ea874077cd.zip | |
f2fs: don't use GFP_ZERO for page caches
Related to https://lkml.org/lkml/2018/4/8/661
Sometimes, we need to write meta data to new allocated block address,
then we will allocate a zeroed page in inner inode's address space, and
fill partial data in it, and leave other place with zero value which means
some fields are initial status.
There are two inner inodes (meta inode and node inode) setting __GFP_ZERO,
I have just checked them, for both of them, we can avoid using __GFP_ZERO,
and do initialization by ourselves to avoid unneeded/redundant zeroing
from mm.
Cc: <stable@vger.kernel.org>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.h')
| -rw-r--r-- | fs/f2fs/segment.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 3325d0769723..492ad0c86fa9 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -375,6 +375,7 @@ static inline void seg_info_to_sit_page(struct f2fs_sb_info *sbi, int i; raw_sit = (struct f2fs_sit_block *)page_address(page); + memset(raw_sit, 0, PAGE_SIZE); for (i = 0; i < end - start; i++) { rs = &raw_sit->entries[i]; se = get_seg_entry(sbi, start + i); |