On Sun, 25 Jul 2010 17:19:41 +0300 Andriy Gapon <a...@freebsd.org> wrote:
> on 25/07/2010 16:41 RW said the following: > > In FreeBSD the inactive queue contains disk cache pages which > > normally provide most of the clean pages needed. In addition pages > > are dribbled out to swap, and the resulting clean pages are placed > > at the back of the inactive queue to make another pass. > > Well, "normally" and "most" are not quite quantitative. > Personally, I do not see any guarantees that inactive queue would > contain enough clean pages to reach paging target on a single pass. I didn't say it say it was guaranteed. I just think the scenario where a first pass ends up between the watermarks is rare. And when it happens I don't see a compelling reason to do extra paging to reach an arbitrary target. I think the comment about not clearing vm_pages_needed is referring to clearing it below the low-watermark because the daemon would then get woken-up almost immediately. > I meant bare minimum to stop paging, that is, going above lower > watermark of the paging hysteresis. _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
