Messages in this thread |  | | Date | Sun, 16 Sep 2001 10:18:45 -0700 | From | Jeremy Zawodny <> | Subject | Re: broken VM in 2.4.10-pre9 |
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On Sun, Sep 16, 2001 at 07:06:45PM +0200, Ricardo Galli wrote: > On Sun, 16 Sep 2001, Rik van Riel wrote: > > > > > Is there a way to tell the VM to prune its cache? Or a way to limit > > > the amount of cache it uses? > > > > Not yet, I'll make a quick hack for this when I get back next > > week. It's pretty obvious now that the 2.4 kernel cannot get > > enough information to select the right pages to evict from > > memory. > > .... > > On Sun, 16 Sep 2001, Jeremy Zawodny wrote: > > > > Agreed. I'd be great if there was an option to say "Don't swap out > > memory that was allocated by these programs. If you run out of disk > > buffers, toss the oldest ones and start re-using them." > > More easy though (for cases of listening mp3's and backups): cache > pages that were accesed only "once"(*) several seconds ago must be > discarded first. It only implies a check against an access counter > and a "last accesed" epoch fields of the page.
Yeah, something along those lines would be great. It would keep a big (13 GB) drive to drive file copy from causing a large (400MB) and relatively active process from having its memory swapped out (and then back in 20 seconds later).
Imagine watching that for 45 minutes while a backup that used to take 5-8 minutes runs.
Jeremy -- Jeremy D. Zawodny | Perl, Web, MySQL, Linux Magazine, Yahoo! <Jeremy@Zawodny.com> | http://jeremy.zawodny.com/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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