tree 12cd500172561fb43e5cbe1ee1993945a4ac2c5c
parent cf137307cd9827495b65e7d74ea2b610daa9898b
author Jens Axboe <jens.axboe@oracle.com> 1253798711 +0200
committer Jens Axboe <jens.axboe@oracle.com> 1253894906 +0200

writeback: make the super_block pinning more efficient

Currently we pin the inode->i_sb for every single inode. This
increases cache traffic on sb->s_umount sem. Lets instead
cache the inode sb pin state and keep the super_block pinned
for as long as keep writing out inodes from the same
super_block.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>