James, > When SCSI-MQ is enabled, the SCSI-MQ layers will do pre-allocation of > MQ resources based on shost values set by the driver. In newer cases > of the driver, which attempts to set nr_hw_queues to the cpu count, > the multipliers become excessive, with a single shost having SCSI-MQ > pre-allocation reaching into the multiple GBytes range. NPIV, which > creates additional shosts, only multiply this overhead. On lower-memory > systems, this can exhaust system memory very quickly, resulting in a > system crash or failures in the driver or elsewhere due to low memory > conditions. Applied to 5.3/scsi-fixes. Thanks! -- Martin K. Petersen Oracle Linux Engineering
