> From: linux-scsi-owner@xxxxxxxxxxxxxxx [mailto:linux-scsi- > owner@xxxxxxxxxxxxxxx] On Behalf Of Roland Dreier > Sent: January 18, 2012 1:46 PM > To: Ric Wheeler > Cc: linux-fsdevel@xxxxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx > Subject: Re: [LSF/MM TOPIC] linux servers as a storage server - what's > missing? > > > 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. Depends on the use-case. In the particular (SAN)use-case that I'm talking about, you shouldn't unplug live sdX which is still mapped on the target(array) side. I've attempted to fix it somewhere and it works. If you need more info about eh and initiator fixes, email me offline. When would this case arise? : a) you unknowingly unmap *hot* LUNs from target(array) while managing the array. End result - reset storm on front-end. You just need a smarter way to isolate/localize this front-end storm. Chetan Loke -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
