Date: Sat, 16 Feb 2002 14:00:04 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Alfred Perlstein <bright@mu.org> Cc: Poul-Henning Kamp <phk@critter.freebsd.dk>, arch@FreeBSD.ORG, jhb@FreeBSD.ORG, peter@wemm.org, jake@locore.ca Subject: Re: gettimeofday() and crhold()/crfree() (was Re: gettimeofday() and copyout(). Is copyout() MPSAFE on non-i386 archs? ) Message-ID: <200202162200.g1GM04F39752@apollo.backplane.com> References: <6988.1013844797@critter.freebsd.dk> <200202162033.g1GKXOf13029@apollo.backplane.com> <20020216214709.GA12136@elvis.mu.org>
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:Go ahead with using mutex pools for creds, I thought I'd done it
:already but it looks like I only got to struct file and struct
:uidinfo. :)
:
:I do sort of think that keeping your own cred freelist is probably
:a bad idea especially with what Jeff R has coming down the pipe for
:us. But we can take that out later if something better comes along.
:
:-Alfred
Well, I dunno... I'm warming to the idea if it in fact eases the job
of pushing Giant down. It seems so easy to do for the ucred, though
of course I am not trying to proactively trim down the size of the
freelist (yet)... but even that would be fairly simple to do in the
allocation code by adding a count of the number of items in the freelist.
It would be another ten lines of code relative to the patch
I just posted. int cr_free_count; .. in allocation code do
while (cr_free_count > HYSTERESIS) { ... free ... }
-Matt
Matthew Dillon
<dillon@backplane.com>
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