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本节介绍如何设置磁盘调度算法。

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临时修改调度策略

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例如将所有IO调度算法修改为mq-deadline，此修改重启后会失效。

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1# echo  mq-deadline  >  /sys/block/sd*/queue/scheduler
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永久设置调度策略

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可以通过在内核启动配置文件grub.cfg中的kernel行追加：elevator=mq-deadline，重启后生效。

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1# vi /boot/grub2/grub.cfg
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或者

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1# vi /boot/efi/EFI/Baidulinux/grub.cfg\n2linux   /vmlinuz-5.10.0-216.0.0.115.bd2.x86_64 root=/dev/mapper/baidulinux-root ro resume=/dev/mapper/baidulinux-swap rd.lvm.lv=baidulinux/root rd.lvm.lv=baidulinux/swap cgroup_disable=files apparmor=0 crashkernel=512M elevator=mq-deadline
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