Le mercredi 05 avril 2006 à 12:07 +0200, Frédéric Grosshans a écrit : > Le mercredi 05 avril 2006 à 11:21 +0930, Iain Buchanan a écrit : > > On Tue, 2006-04-04 at 20:18 -0500, Roy Wright wrote: > > > 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 -- gentoo-user@gentoo.org mailing list
