No deadline I/O scheduler for 2.6.29-0.137.rc5.git4.fc11

Bruno Wolff III bruno at wolff.to
Fri Feb 20 19:21:08 UTC 2009


On Fri, Feb 20, 2009 at 14:12:33 -0500,
  Dave Jones <davej at redhat.com> wrote:
> On Fri, Feb 20, 2009 at 01:03:00PM -0600, Bruno Wolff III wrote:
>  > On Fri, Feb 20, 2009 at 13:48:53 -0500,
>  >   Dave Jones <davej at redhat.com> wrote:
>  > > On Fri, Feb 20, 2009 at 12:41:41PM -0600, Bruno Wolff III wrote:
>  > >  > When I booted up the 2.6.29-0.137.rc5.git4.fc11.x86_64 kernel today I got
>  > >  > an error message about there not being a deadline scheduler. I didn't see
>  > >  > a changelog entry that covered this. Is this a temporary change?
>  > > 
>  > > What's the exact message you're seeing ?
>  > 
>  > This is what is in /var/log/messages:
>  > Feb 20 12:37:14 cerberus kernel: I/O scheduler deadline not found
>  > 
>  > I think only "I/O scheduler deadline not found" was displayed on the screen
>  > during the boot process.
> 
> The module exists, but nothing loads it by default.
> 
> in rc.local or wherever you have it set up to use deadline, you also need
> to modprobe deadline-iosched.

I never had to do that before. I just noticed there error message today,
but looking back it seems to have first shown up on February 10th.
I am using the scheduler=deadline kernel parameter in grub.conf.
If I do it that way, do I add something to /etc/modprobe.conf?




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