On Wed, Jan 18, 2012 at 6:46 PM, Roland Dreier <roland@xxxxxxxxxxxxxxx> wrote: > > Why would you crash is you have device mapper multipath configured to handle > > path fail over? We have tons of enterprise customers that use that... > > cf http://www.spinics.net/lists/linux-scsi/msg56254.html > > Basically hot unplug of an sdX can oops on any recent kernel, no > matter what dm stuff you have on top. > > > On the broader topic of error handling and so on, I do agree that is always > > an area of concern (how many times to retry, how long time outs need to be, > > when to panic/reboot or propagate up an error code) > > Yes, especially the scsi eh stuff escalating to a host reset when > a single drive has gone bad -- even if the HBA is happily doing IO > to other drives, we'll kill access to the whole SAS fabric. With which SCSI low-level diver does that occur and how does the call stack look like ? I haven't encountered any such issues while testing the srp-ha patch set. However, I have to admit that the issues mentioned in the description of commit 3308511 were discovered while testing the srp-ha patch set. Bart. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
