Mike Christie wrote: > On 08/07/2009 05:27 AM, Hannes Reinecke wrote: >> LU Reset TMF can take quite some time to abort all pending >> commands. Any other TMF submitted at that time will autmatically >> fail. However, there is no reason to not allow another >> TMF once we received the response as the only shared resource >> here is the complete callback. > > > Could you answer my question on how you are testing this? > See my other mail. I'm injecting LU Reset operations via sg_reset. And occasionally the LU Reset stalls for quite some time, so that I would be able to send a LU Reset to other LUNs; only, I can't as I can send only one LU Reset via a connection/host.
> scsi-ml eh only allows one eh operation, and injecting tmfs tries to > only allow one (there is a race though). > Yes, but this disregards user-space initiated resets. > How useful is this too? Did I ask this before? Is the cleanup taking > that long in some cases? If so, what are the cases? > Oh, various. Occasionally the target just stalls for some time, in others it takes us quite some time to abort all outstanding tasks (mostly due to logging; I'm logging every SCSI cmd abort via serial console) etc. But on further checking, we'll have to keep the tmf hdr around currently so as to check which device / LUN is affected. So we cannot send concurrent TMFs anyway as we would overwrite the header then. Alright, you're correct. Doesn't make sense. Ignore it. Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage h...@suse.de +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Markus Rex, HRB 16746 (AG Nürnberg) --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---
