Just so you guys know, I am not ignoring this issue. I think I can fix all the issues in one shot. I am going to post some lio/ceph stuff for my day job this week, and then I will try to post my patch for this issue.
On 01/27/2016 06:01 AM, Sagi Grimberg wrote: > >>> Since iscsi responses from the kernel are multicast we might get into >>> a situation where multiple discoveryd handle the same response. >>> With this commit we use a shared mutex to lock between the discoveryd >>> forks >>> so each fork will handle its intended portal. >>> So we wait for login and stale logouts to finish between releasing >>> the mutex. >>> >>> Signed-off-by: Roi Dayan <r...@mellanox.com> >>> Signed-off-by: Sagi Grimberg <sa...@mellanox.com> >>> --- >>> Hi, >>> >>> The issue was discovered after working with discoveryd and offload >>> driver >>> which needed the following patch that was already submitted to the >>> mailing list: >>> >> > > Hi Mike, long time... :) > >> Are the problem events the discovery related ones like the ep_connect >> ones, or is this a problem with the normal session login/logout events >> too? > > This problem of multiple instances handling a NL multicast event, so > even for session_create etc... Each time we ask the kernel to do > something we're bound to race. > > The tcp discoveryd doesn't use the kernel to establish the discovery > session so it's not a problem there. > >> Do we still hit the same problem if someone were to run iscsiadm while >> this is running, or if we were to just run multiple instances of >> iscsiadm? > > Exactly. running two instances of iscsiadm triggers the same race > conditions and we may end up asking the kernel to create the leading > conn on the a session id twice (and other weird things). > > We'll need to fix that too, but we figured we'd start small and fix a > real bug report. > -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at https://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
