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VFS: increase pseudo-filesystem block size to PAGE_SIZE 

This commit:

    commit ba52de123d
    Author: Theodore Ts'o <tytso@mit.edu>
    Date:   Wed Sep 27 01:50:49 2006 -0700

        [PATCH] inode-diet: Eliminate i_blksize from the inode structure

caused the block size used by pseudo-filesystems to decrease from
PAGE_SIZE to 1024 leading to a doubling of the number of context switches
during a kernbench run.

Signed-off-by: Alex Nixon <Alex.Nixon@citrix.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ian Campbell <Ian.Campbell@eu.citrix.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: <stable@kernel.org>		[2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alex Nixon 2008-07-29 22:33:03 -07:00 committed by Linus Torvalds
parent fdac4e69a1
commit 3971e1a917
1 changed files with 2 additions and 2 deletions
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4
fs/libfs.c
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@ -216,8 +216,8 @@ int get_sb_pseudo(struct file_system_type *fs_type, char *name,
s->s_flags = MS_NOUSER; s->s_flags = MS_NOUSER;
s->s_maxbytes = ~0ULL; s->s_maxbytes = ~0ULL;
s->s_blocksize = 1024; s->s_blocksize = PAGE_SIZE;
s->s_blocksize_bits = 10; s->s_blocksize_bits = PAGE_SHIFT;
s->s_magic = magic; s->s_magic = magic;
s->s_op = ops ? ops : &simple_super_operations; s->s_op = ops ? ops : &simple_super_operations;
s->s_time_gran = 1; s->s_time_gran = 1;