Date: Sun, 08 Jul 2001 00:26:38 -0700 From: Peter Wemm <peter@wemm.org> To: Greg Lehey <grog@FreeBSD.org> Cc: Alfred Perlstein <bright@sneakerz.org>, Matt Dillon <dillon@earth.backplane.com>, "Justin T. Gibbs" <gibbs@scsiguy.com>, John Baldwin <jhb@FreeBSD.org>, Jake Burkholder <jake@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org, Matthew Jacob <mjacob@feral.com>, Doug Rabson <dfr@nlsystems.com> Subject: Re: cvs commit: src/sys/sys systm.h condvar.h src/sys/kern kern_ Message-ID: <20010708072638.64AED380F@overcee.netplex.com.au> In-Reply-To: <20010708143050.X80862@wantadilla.lemis.com>
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Greg Lehey wrote: > On Saturday, 7 July 2001 at 21:13:44 -0500, Alfred Perlstein wrote: [..] > > 2) any processes it comes across that are swapped out are woken > > up. this is to avoid letting processes die, however it makes > > for a rude suprise especially when you have dozens of apache > > processes swapped out waiting on thier listening socket, it > > effectively causes much pain as thrashing starts and the > > machine goes down in a firery death. > > the solution is to implement a max on the number of swapped > > out processes that wakeup_one will swap in, and keep it somewhat > > low. > > Hmm. I hadn't noticed that before. We had run into it at work on a number of occasions. This is why we use wakeup_just_one() at Yahoo and dont use the broken freebsd wakeup_one() at all. Cheers, -Peter -- Peter Wemm - peter@FreeBSD.org; peter@yahoo-inc.com; peter@netplex.com.au "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 cvs-all" in the body of the message
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