Hi Currently for device-mapper devices, we initialize the mempool for requests and elevator at device creation time. But only request-based devices use the elevator and mempool. These patches change it to allocate the mempool and initialize the elevator only for request-based devices. This is done by allocating a queue at device creation time, but delaying the initialization of elevator and allocation of mempool till the first table load time, when the type of device would be known. [PATCH 1/2] Allow delaying initialization of queue after allocation [PATCH 2/2] Initialize mempool and elevator only for request-based dm devices Another approach would be to free the mempool and detach elevator, if it would be a bio-based device. But it is better to avoid initialization itself. Thanks Nikanth -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
