On Tue, Jun 20, 2017 at 11:19 AM, Sagi Grimberg <sagi@xxxxxxxxxxx> wrote: > >> Testing this patch I didn't see these new messages even when rebooting >> the targets multiple times. It also resolved some performance problems >> I was seeing (I think our switches are having bugs with IPv6 and >> routing) and I was receiving expected performance. At one point in the >> test, one target (4.9.33) showed: >> [Tue Jun 20 10:11:20 2017] iSCSI Login timeout on Network Portal [::]:3260 >> [Tue Jun 20 10:11:39 2017] iSCSI Login timeout on Network Portal [::]:3260 >> [Tue Jun 20 10:11:58 2017] isert: isert_print_wc: login send failure: >> transport retry counter exceeded (12) vend_err 81 > > > I don't understand, is this new with the patch applied? I applied your patch to 4.12-rc6 on the initiator, but my targets are still 4.9.33 since it looked like the patch only affected the initiator. I did not see this before your patch, but I also didn't try rebooting the targets multiple times before because of the previous messages. >> After this and a reboot of the target, the initiator would drop the >> connection after 1.5-2 minutes then faster and faster until it was >> every 5 seconds. It is almost like it set up the connection then lose >> the first ping, or the ping wasn't set-up right. I tried rebooting the >> target multiple times. > > > So the initiator could not recover even after the target as available > again? The initiator recovered the connection when the target came back, but the connection was not stable. I/O would happen on the connection, then it would get shaky and then finally disconnect. Then it would reconnect, pass more I/O, then get shaky and go down again. With the 5 second disconnects, it would pass traffic for 5 seconds, then as soon as I saw the ping timeout, the I/O would stop until it reconnected. At that point it seems that the lack of pings would kill the I/O unlike earlier where there was a stall in I/O and then the connection would be torn down. I can try to see if I can get it to happen again. ---------------- Robert LeBlanc PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
