Commit b1843d23 authored by Dominique Martinet's avatar Dominique Martinet
Browse files

9p: set readahead and io size according to maxsize 

having a readahead of 128k with a msize of 128k (with overhead) lead to
reading 124+4k everytime, making two roundtrips needlessly.

tune readahead according to msize when cache is enabled for better
performance

Link: http://lkml.kernel.org/r/20211104120323.2189376-1-asmadeus@codewreck.org


Signed-off-by: default avatarDominique Martinet <asmadeus@codewreck.org>
parent 05f975cd

fs/9p/vfs_super.c

+3 −0
Original line number Diff line number Diff line
@@ -79,6 +79,9 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, 
	if (!v9ses->cache) {

		sb->s_bdi->ra_pages = 0;

		sb->s_bdi->io_pages = 0;

	} else {

		sb->s_bdi->ra_pages = v9ses->maxdata >> PAGE_SHIFT;

		sb->s_bdi->io_pages = v9ses->maxdata >> PAGE_SHIFT;

	}



	sb->s_flags |= SB_ACTIVE | SB_DIRSYNC;