github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-27 16:44:58 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

f2fs: avoid splitting bio when reading multiple pages

Browse Source 
When fewer pages are read, nr_pages may be smaller than nr_cpages. Due
to the nr_vecs limit, the compressed pages will be split into multiple
bios and then merged at the block level. In this case, nr_cpages should
be used to pre-allocate bvecs.
To handle this case, align max_nr_pages to cluster_size, which should be
enough for all compressed pages.

Signed-off-by: Jianan Huang <huangjianan@xiaomi.com>
Signed-off-by: Sheng Yong <shengyong1@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jianan Huang 2025-06-30 20:57:53 +08:00 committed by Jaegeuk Kim
parent e23ab8028d
commit 185f203a69
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
fs/f2fs/data.c
View File

@ -2303,7 +2303,7 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
}
if (!bio) {
bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages - i,
f2fs_ra_op_flags(rac),
folio->index, for_write);
if (IS_ERR(bio)) {
@ -2376,6 +2376,14 @@ static int f2fs_mpage_readpages(struct inode *inode,
unsigned max_nr_pages = nr_pages;
int ret = 0;
#ifdef CONFIG_F2FS_FS_COMPRESSION
if (f2fs_compressed_file(inode)) {
index = rac ? readahead_index(rac) : folio->index;
max_nr_pages = round_up(index + nr_pages, cc.cluster_size) -
round_down(index, cc.cluster_size);
}
#endif
map.m_pblk = 0;
map.m_lblk = 0;
map.m_len = 0;