This is a discussion on [patch 18/29] VFS: increase pseudo-filesystem block size to PAGE_SIZE - Kernel ; 2.6.25-stable review patch. If anyone has any objections, please let us know. ------------------ From: Alex Nixon commit 3971e1a917548977cff71418a7c3575ffbc9571f upstream This commit: commit ba52de123d454b57369f291348266d86f4b35070 Author: Theodore Ts'o Date: Wed Sep 27 01:50:49 2006 -0700 [PATCH] inode-diet: Eliminate i_blksize from the inode ...
2.6.25-stable review patch. If anyone has any objections, please let us
know.
------------------
From: Alex Nixon
commit 3971e1a917548977cff71418a7c3575ffbc9571f upstream
This commit:
commit ba52de123d454b57369f291348266d86f4b35070
Author: Theodore Ts'o
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
Cc: Andi Kleen
Cc: Jeremy Fitzhardinge
Cc: Peter Zijlstra
Cc: Ingo Molnar
Cc: Ian Campbell
Cc: "Theodore Ts'o"
Cc: Alexander Viro
Cc: Hugh Dickins
Cc: Jens Axboe
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
Signed-off-by: Greg Kroah-Hartman
---
fs/libfs.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/libfs.c
+++ b/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;
--
--
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