VFS: increase pseudo-filesystem block size to PAGE_SIZE

VFS: increase pseudo-filesystem block size to PAGE_SIZE

This commit:

    commit ba52de123d454b57369f291348266d86f4b35070
    Author: Theodore Ts'o <[email protected]>
    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 <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Ian Campbell <[email protected]>
Cc: "Theodore Ts'o" <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: <[email protected]>		[2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>