Re: [gentoo-user] PORTAGE_NICENESS for real

[Grant <emailgrant@gmail.com>]

> > > It would be nice if there was a nice command for making disk access nice
> > > so I could nicely say `nice emerge -uD world` and it wouldn't take a
> > > whole lot of disk time away from my nice browsing, music playing, etc...
> >
> > I think /usr/src/linux/Documentation/block/ioprio.txt is your friend.
> > (I'll read it when (if?) I'll have the time, so I can't sum it up for
> > you !)
>
> OK, I've read it.
> If you configure the CFQ-IOscheduler in your kernel, you can write an
> ionice tool (source code given) which is like nice, but for the disk.
> Furthermore, there exist a IOPRIO_CLASS_IDLE priority class which is
> exactly what we are looking for (no disk access if any other process
> wants a disk access).
>
> Is there a plan to use those IOPRIO classes in Portage ? It could be
> very useful for laptops (with very slow disks).
>
> BTW, is there a plan to use the new SCHED_BATCH scheduling policy
> introduced in the last (2.6.16) kernel ? (see
> http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b0a9499c3dd50d333e2aedb7e894873c58da3785 )
>
>
>         Fred

So those tools aren't useful for this problem until they are
integrated into portage?

- Grant

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