From 0b335b9d7d5f0b832e90ac469480789c07be80ad Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Tue, 23 Jun 2009 12:30:43 +0300 Subject: UBIFS: slightly optimize write-buffer timer usage This patch adds the following minor optimization: 1. If write-buffer does not use the timer, indicate it with the wbuf->no_timer variable, instead of using the wbuf->softlimit variable. This is better because wbuf->softlimit is of ktime_t type, and the ktime_to_ns function contains 64-bit multiplication. 2. Do not call the 'hrtimer_cancel()' function for write-buffers which do not use timers. 3. Do not cancel the timer in 'ubifs_put_super()' because the synchronization function does this. This patch also removes a confusing comment. Signed-off-by: Artem Bityutskiy --- fs/ubifs/super.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 79fad43f3c57..5bb272c56a9b 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -797,7 +797,7 @@ static int alloc_wbufs(struct ubifs_info *c) * does not need to be synchronized by timer. */ c->jheads[GCHD].wbuf.dtype = UBI_LONGTERM; - c->jheads[GCHD].wbuf.softlimit = ktime_set(0, 0); + c->jheads[GCHD].wbuf.no_timer = 1; return 0; } @@ -1754,10 +1754,8 @@ static void ubifs_put_super(struct super_block *sb) /* Synchronize write-buffers */ if (c->jheads) - for (i = 0; i < c->jhead_cnt; i++) { + for (i = 0; i < c->jhead_cnt; i++) ubifs_wbuf_sync(&c->jheads[i].wbuf); - hrtimer_cancel(&c->jheads[i].wbuf.timer); - } /* * On fatal errors c->ro_media is set to 1, in which case we do -- cgit v1.2.3