| Message ID | 1431529052-13932-3-git-send-email-idryomov@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, 13 May 2015, Ilya Dryomov wrote: > This reverts commit ba9d114ec5578e6e99a4dfa37ff8ae688040fd64. > > .. which introduced a regression that prevented all lingering requests > requeued in kick_requests() from ever being sent to the OSDs, resulting > in a lot of missed notifies. In retrospect it's pretty obvious that > r_req_lru_item item in the case of lingering requests can be used not > only for notarget, but also for unsent linkage due to how tightly > actual map and enqueue operations are coupled in __map_request(). > > The assertion that was being silenced is taken care of in the previous > ("libceph: request a new osdmap if lingering request maps to no osd") > commit: by always kicking homeless lingering requests we ensure that > none of them ends up on the notarget list outside of the critical > section guarded by request_mutex. > > Cc: stable@vger.kernel.org # 3.18+, needs 3d8c73c93605 "libceph: request a new osdmap if lingering request maps to no osd" > Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Sage Weil <sage@redhat.com> > --- > net/ceph/osd_client.c | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c > index 31d4b1ebff01..c4ec9239249a 100644 > --- a/net/ceph/osd_client.c > +++ b/net/ceph/osd_client.c > @@ -1306,8 +1306,6 @@ static void __unregister_linger_request(struct ceph_osd_client *osdc, > if (list_empty(&req->r_osd_item)) > req->r_osd = NULL; > } > - > - list_del_init(&req->r_req_lru_item); /* can be on notarget */ > ceph_osdc_put_request(req); > } > > -- > 1.9.3 > > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 31d4b1ebff01..c4ec9239249a 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -1306,8 +1306,6 @@ static void __unregister_linger_request(struct ceph_osd_client *osdc, if (list_empty(&req->r_osd_item)) req->r_osd = NULL; } - - list_del_init(&req->r_req_lru_item); /* can be on notarget */ ceph_osdc_put_request(req); }
This reverts commit ba9d114ec5578e6e99a4dfa37ff8ae688040fd64. .. which introduced a regression that prevented all lingering requests requeued in kick_requests() from ever being sent to the OSDs, resulting in a lot of missed notifies. In retrospect it's pretty obvious that r_req_lru_item item in the case of lingering requests can be used not only for notarget, but also for unsent linkage due to how tightly actual map and enqueue operations are coupled in __map_request(). The assertion that was being silenced is taken care of in the previous ("libceph: request a new osdmap if lingering request maps to no osd") commit: by always kicking homeless lingering requests we ensure that none of them ends up on the notarget list outside of the critical section guarded by request_mutex. Cc: stable@vger.kernel.org # 3.18+, needs 3d8c73c93605 "libceph: request a new osdmap if lingering request maps to no osd" Signed-off-by: Ilya Dryomov <idryomov@gmail.com> --- net/ceph/osd_client.c | 2 -- 1 file changed, 2 deletions(-)