On 05/16/2012 09:29 AM, Bernd Schubert wrote: > On 05/16/2012 04:06 PM, James Bottomley wrote: >> On Wed, 2012-05-16 at 14:28 +0200, Bernd Schubert wrote: >>> shost->can_queue -> 62 here >>> shost->host_busy -> 62 when one of the multipath groups does IO, >>> further >>> multipath groups then seem to get stalled. >>> >>> I'm not sure yet why multipath_busy() does not stall IO when there is a >>> passive path in the prio group. >>> >>> Any idea how to properly address this problem? >> >> shost->can_queue is supposed to represent the maximum number of possible >> outstanding commands per HBA (i.e. the HBA hardware limit). Assuming >> the driver got it right, the only way of increasing this is to buy a >> better HBA. > > HBA is a mellanox IB adapter. I have not checked yet where the limit of What driver is this with? SRP or iSER or something else? -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
