Date: Mon, 06 Jan 2003 12:17:05 -0800 From: Peter Wemm <peter@wemm.org> To: Bruce Evans <bde@zeta.org.au> Cc: Julian Elischer <julian@elischer.org>, Jake Burkholder <jake@locore.ca>, arch@FreeBSD.ORG Subject: Re: uarea/kstack/pcb/swapout sillyness Message-ID: <20030106201705.98CDB2A8A0@canning.wemm.org> In-Reply-To: <20030107061643.F4486-100000@gamplex.bde.org>
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Bruce Evans wrote: [..] > > > Wether or not swapping kernel stacks is still useful I don't really know. > > > > Well they are bigger, and a process might have quite a few of them. > > A process with 10 suspended threads, each or 3 pages would be 30 pages > > or 120KB. It's a judgement call I guess. > > I'm sure there are strange process mixes that could benefit from swapping > 120KB per process, but I think they must be very uncommon now. > > Bruce FWIW, the i386 has a relatively small stack. Other platforms are not so lucky and they add up.. 32K or 64K per thread is more painful than 8K per thread. Cheers, -Peter -- Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com "All of this is for nothing if we don't go to the stars" - JMS/B5 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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