centos 7.3中使能blk-mq

scsi-mq

RHEL7.2 release note

使能scsi-mq

添加scsi_mod.use_blk_mq=y到内核命令行：（也可以添加dm_mod.use_blk_mq=y来使能blk-mq，减少DM层的开销）

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$ cat /etc/default/grub GRUB_TIMEOUT=5GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"GRUB_DEFAULT=savedGRUB_DISABLE_SUBMENU=trueGRUB_TERMINAL_OUTPUT="console"GRUB_CMDLINE_LINUX="crashkernel=auto rd.md.uuid=c13f982e:9af61476:91e4a31e:1bc18c08 scsi_mod.use_blk_mq=y dm_mod.use_blk_mq=y rhgb quiet"GRUB_DISABLE_RECOVERY="true"$ grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg$ reboot

确保使能成功

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tree /sys/class/block/sdl/mq /sys/class/block/dm-0/mq