From ad885927dee2e72fbfab624c7599cb9d9352cc04 Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Mon, 25 Mar 2013 18:16:11 -0500 Subject: [PATCH] libceph: keep request lists in tid order In __map_request(), when adding a request to an osd client's unsent list, add it to the tail rather than the head. That way the newest entries (with the highest tid value) will be last. Maintain an osd's request list in order of increasing tid also. Finally--to be consistent--maintain an osd client's "notarget" list in that order as well. This partially resolves: http://tracker.ceph.com/issues/4392 Signed-off-by: Alex Elder Reviewed-off-by: Sage Weil --- net/ceph/osd_client.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 8b84fb4..356f7bc 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -619,7 +619,7 @@ static void __kick_osd_requests(struct ceph_osd_client *osdc, BUG_ON(!list_empty(&req->r_req_lru_item)); __register_request(osdc, req); list_add_tail(&req->r_req_lru_item, &osdc->req_unsent); - list_add(&req->r_osd_item, &req->r_osd->o_requests); + list_add_tail(&req->r_osd_item, &req->r_osd->o_requests); __unregister_linger_request(osdc, req); dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid, osd->o_osd); @@ -1035,10 +1035,10 @@ static int __map_request(struct ceph_osd_client *osdc, if (req->r_osd) { __remove_osd_from_lru(req->r_osd); - list_add(&req->r_osd_item, &req->r_osd->o_requests); - list_move(&req->r_req_lru_item, &osdc->req_unsent); + list_add_tail(&req->r_osd_item, &req->r_osd->o_requests); + list_move_tail(&req->r_req_lru_item, &osdc->req_unsent); } else { - list_move(&req->r_req_lru_item, &osdc->req_notarget); + list_move_tail(&req->r_req_lru_item, &osdc->req_notarget); } err = 1; /* osd or pg changed */ -- 2.7.4