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authorJens Axboe <axboe@suse.de>2005-06-27 10:55:12 +0200
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-27 14:33:29 -0700
commit22e2c507c301c3dbbcf91b4948b88f78842ee6c9 (patch)
tree9a97c91d1362e69703aa286021daffb8a5456f4c /fs/reiserfs/journal.c
parent020f46a39eb7b99a575b9f4d105fce2b142acdf1 (diff)
downloadop-kernel-dev-22e2c507c301c3dbbcf91b4948b88f78842ee6c9.zip
op-kernel-dev-22e2c507c301c3dbbcf91b4948b88f78842ee6c9.tar.gz
[PATCH] Update cfq io scheduler to time sliced design
This updates the CFQ io scheduler to the new time sliced design (cfq v3). It provides full process fairness, while giving excellent aggregate system throughput even for many competing processes. It supports io priorities, either inherited from the cpu nice value or set directly with the ioprio_get/set syscalls. The latter closely mimic set/getpriority. This import is based on my latest from -mm. Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/reiserfs/journal.c')
-rw-r--r--fs/reiserfs/journal.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index 7b87707..d1bcf0d 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -645,18 +645,22 @@ struct buffer_chunk {
static void write_chunk(struct buffer_chunk *chunk) {
int i;
+ get_fs_excl();
for (i = 0; i < chunk->nr ; i++) {
submit_logged_buffer(chunk->bh[i]) ;
}
chunk->nr = 0;
+ put_fs_excl();
}
static void write_ordered_chunk(struct buffer_chunk *chunk) {
int i;
+ get_fs_excl();
for (i = 0; i < chunk->nr ; i++) {
submit_ordered_buffer(chunk->bh[i]) ;
}
chunk->nr = 0;
+ put_fs_excl();
}
static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh,
@@ -918,6 +922,8 @@ static int flush_commit_list(struct super_block *s, struct reiserfs_journal_list
return 0 ;
}
+ get_fs_excl();
+
/* before we can put our commit blocks on disk, we have to make sure everyone older than
** us is on disk too
*/
@@ -1055,6 +1061,7 @@ put_jl:
if (retval)
reiserfs_abort (s, retval, "Journal write error in %s", __FUNCTION__);
+ put_fs_excl();
return retval;
}
@@ -1251,6 +1258,8 @@ static int flush_journal_list(struct super_block *s,
return 0 ;
}
+ get_fs_excl();
+
/* if all the work is already done, get out of here */
if (atomic_read(&(jl->j_nonzerolen)) <= 0 &&
atomic_read(&(jl->j_commit_left)) <= 0) {
@@ -1450,6 +1459,7 @@ flush_older_and_return:
put_journal_list(s, jl);
if (flushall)
up(&journal->j_flush_sem);
+ put_fs_excl();
return err ;
}
@@ -2719,6 +2729,7 @@ relock:
th->t_trans_id = journal->j_trans_id ;
unlock_journal(p_s_sb) ;
INIT_LIST_HEAD (&th->t_list);
+ get_fs_excl();
return 0 ;
out_fail:
@@ -3526,6 +3537,7 @@ static int do_journal_end(struct reiserfs_transaction_handle *th, struct super_b
BUG_ON (th->t_refcount > 1);
BUG_ON (!th->t_trans_id);
+ put_fs_excl();
current->journal_info = th->t_handle_save;
reiserfs_check_lock_depth(p_s_sb, "journal end");
if (journal->j_len == 0) {
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