[LSF/VM TOPIC] Handling of invalid requests in virtual HBAs

[Hannes Reinecke <hare@suse.de>]

Hi all,

[Topic]
Handling of invalid requests in virtual HBAs

[Abstract]
This discussion will focus on the problem of correct request handling with virtual HBAs.
For KVM I have implemented a 'megasas' HBA emulation which serves as a backend for the
megaraid_sas linux driver.
It is now possible to connect several disks from different (physical) HBAs to that
HBA emulation, each having different logical capabilities wrt transfersize,
sgl size, sgl length etc.

The goal of this discussion is how to determine the 'best' capability setting for the
virtual HBA and how to handle hotplug scenarios, where a disk might be plugged in
which has incompatible settings from the one the virtual HBA is using currently.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html