allocate 4096 bytes for 4k alligned devices

[k0da]

To make 4k scsi devices to work, allocated memory needs to be increased accordingly

Tested in the following scenario:

modprobe scsi_debug dev_size_mb=100 sector_size=4096

parted /dev/sdc u b p Model: Linux scsi_debug (scsi) Disk /dev/sdc: 209715200B Sector size (logical/physical): 4096B/4096B Partition Table: msdos

Number Start End Size Type File system Flags 1 262144B 2097151B 1835008B primary boot, prep, type=41 2 2097152B 200015871B 197918720B primary type=83

qemu-system-ppc64 -enable-kvm -M pseries -m 1024 -nographic -drive file=/dev/sdc,if=none,format=raw,id=drive-scsi0 -device scsi-block,drive=drive-scsi0,id=scsi0 -vga none

Signed-off-by: Dinar Valeev [email protected]