[pve-devel] switch to deadline scheduler by default

Alexandre DERUMIER aderumier at odiso.com
Wed Mar 14 10:55:29 CET 2012


Hi,

I see some user reports about io problem with cfq scheduler

http://forum.proxmox.com/threads/8661-Proxmox-soft-lockups-on-megaraid-controller?p=49095#post49095
http://forum.proxmox.com/threads/7764-i-o-problem/page2

What do you think about switching to deadline scheduler by default ?

Also deadline perform with with virtio devices (this is the default scheduler for rhev)
For my iscsi san, it also perform better.

just put


GRUB_CMDLINE_LINUX_DEFAULT="elevator=deadline"

in /etc/default/grub



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