[pve-devel] switch to deadline scheduler by default

[Dietmar Maurer]

Many feature only work with CFQ (ionice, openvz IO priorities), so this is not an option.

> I see some user reports about io problem with cfq scheduler

>From what I see, all those users run some very limited hardware.

- Dietmar

> 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