From 74669416f747363c14dba2ee6137540ae5a6834f Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Tue, 19 Sep 2006 11:17:38 -0400 Subject: [GFS2] Use list_for_each_entry_safe_reverse in gfs2_ail1_start() This is an attempt to fix Red Hat bz 204364. I don't hit it all the time, but with these changes, running postmark which used to trigger it on a regular basis no longer appears to. So I'm not saying that its 100% certain that its fixed, but it does look promising at the moment. Signed-off-by: Steven Whitehouse --- fs/gfs2/log.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) (limited to 'fs/gfs2/log.c') diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c index 08b80b263ad..6112d648b7e 100644 --- a/fs/gfs2/log.c +++ b/fs/gfs2/log.c @@ -62,8 +62,9 @@ void gfs2_ail1_start(struct gfs2_sbd *sdp, int flags) { struct list_head *head = &sdp->sd_ail1_list; u64 sync_gen; - struct list_head *first, *tmp; - struct gfs2_ail *first_ai, *ai; + struct list_head *first; + struct gfs2_ail *first_ai, *ai, *tmp; + int done = 0; gfs2_log_lock(sdp); if (list_empty(head)) { @@ -75,27 +76,25 @@ void gfs2_ail1_start(struct gfs2_sbd *sdp, int flags) first = head->prev; first_ai = list_entry(first, struct gfs2_ail, ai_list); first_ai->ai_sync_gen = sync_gen; - gfs2_ail1_start_one(sdp, first_ai); + gfs2_ail1_start_one(sdp, first_ai); /* This may drop log lock */ if (flags & DIO_ALL) first = NULL; - for (;;) { + while(!done) { if (first && (head->prev != first || gfs2_ail1_empty_one(sdp, first_ai, 0))) break; - for (tmp = head->prev; tmp != head; tmp = tmp->prev) { - ai = list_entry(tmp, struct gfs2_ail, ai_list); + done = 1; + list_for_each_entry_safe_reverse(ai, tmp, head, ai_list) { if (ai->ai_sync_gen >= sync_gen) continue; ai->ai_sync_gen = sync_gen; - gfs2_ail1_start_one(sdp, ai); + gfs2_ail1_start_one(sdp, ai); /* This may drop log lock */ + done = 0; break; } - - if (tmp == head) - break; } gfs2_log_unlock(sdp); -- cgit v1.2.3-18-g5258