diff options
| author | Chao Yu <chao@kernel.org> | 2023-02-02 10:04:56 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2023-02-03 00:37:16 +0300 |
| commit | 2eae077e6e46f9046d383631145750e043820dce (patch) | |
| tree | de30012f63a74b8e66901b458ca58a6eaaf7dc2a /fs/f2fs/compress.c | |
| parent | a28bca0f47feb5cdfc22be0e563bd4da2aed74f7 (diff) | |
| download | linux-2eae077e6e46f9046d383631145750e043820dce.tar.xz | |
f2fs: reduce stack memory cost by using bitfield in struct f2fs_io_info
This patch tries to use bitfield in struct f2fs_io_info to improve
memory usage.
struct f2fs_io_info {
...
unsigned int need_lock:8; /* indicate we need to lock cp_rwsem */
unsigned int version:8; /* version of the node */
unsigned int submitted:1; /* indicate IO submission */
unsigned int in_list:1; /* indicate fio is in io_list */
unsigned int is_por:1; /* indicate IO is from recovery or not */
unsigned int retry:1; /* need to reallocate block address */
unsigned int encrypted:1; /* indicate file is encrypted */
unsigned int post_read:1; /* require post read */
...
};
After this patch, size of struct f2fs_io_info reduces from 136 to 120.
[Nathan: fix a compile warning (single-bit-bitfield-constant-conversion)]
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/compress.c')
| -rw-r--r-- | fs/f2fs/compress.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index b196b881f3bb..a469cdde6bac 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -1213,10 +1213,11 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc, .page = NULL, .encrypted_page = NULL, .compressed_page = NULL, - .submitted = false, + .submitted = 0, .io_type = io_type, .io_wbc = wbc, - .encrypted = fscrypt_inode_uses_fs_layer_crypto(cc->inode), + .encrypted = fscrypt_inode_uses_fs_layer_crypto(cc->inode) ? + 1 : 0, }; struct dnode_of_data dn; struct node_info ni; |