The patch titled
VFS: increase pseudo-filesystem block size to PAGE_SIZE
has been added to the -mm tree. Its filename is
vfs-increase-pseudo-filesystem-block-size-to-page_size.patch
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Subject: VFS: increase pseudo-filesystem block size to PAGE_SIZE
From: Alex Nixon <alex.nixon@xxxxxxxxxx>
This commit:
commit ba52de123d454b57369f291348266d86f4b35070
Author: Theodore Ts'o <tytso@xxxxxxx>
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@xxxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Cc: "Theodore Ts'o" <tytso@xxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Hugh Dickins <hugh@xxxxxxxxxxx>
Cc: Jens Axboe <jens.axboe@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx> [2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/libfs.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN fs/libfs.c~vfs-increase-pseudo-filesystem-block-size-to-page_size fs/libfs.c
--- a/fs/libfs.c~vfs-increase-pseudo-filesystem-block-size-to-page_size
+++ a/fs/libfs.c
@@ -216,8 +216,8 @@ int get_sb_pseudo(struct file_system_typ
s->s_flags = MS_NOUSER;
s->s_maxbytes = ~0ULL;
- s->s_blocksize = 1024;
- s->s_blocksize_bits = 10;
+ s->s_blocksize = PAGE_SIZE;
+ s->s_blocksize_bits = PAGE_SHIFT;
s->s_magic = magic;
s->s_op = ops ? ops : &simple_super_operations;
s->s_time_gran = 1;
_
Patches currently in -mm which might be from alex.nixon@xxxxxxxxxx are
vfs-increase-pseudo-filesystem-block-size-to-page_size.patch
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