Date: Mon, 18 Feb 2002 23:44:09 -0800 From: Peter Wemm <peter@wemm.org> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Jeroen Ruigrok/asmodai <asmodai@wxs.nl>, Robert Watson <rwatson@FreeBSD.ORG>, Poul-Henning Kamp <phk@FreeBSD.ORG>, cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/sys/kern kern_time.c Message-ID: <20020219074409.728D03A9A@overcee.wemm.org> In-Reply-To: <200202190709.g1J79xM58924@apollo.backplane.com>
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Matthew Dillon wrote: > > :[snip rest of eloquent text] > : > :Didn't you take out Alfred's locking for the VM system a while ago? > :Maybe you could kill time on that in the mean time? > : > :-- > :Jeroen Ruigrok van der Werven / asmodai / Kita no Mono > > It's not possible to test a proper MP solution for the VM system > until we can push Giant down into it from the top down and get a good > piece of the I/O path pulled up from the bottom. The best way to push > Giant down at this stage is from the system calls down and from the > networking and I/O stacks up. So, you cant do VM lock pushdown because you cant test it? Excuse me, but isn't the solution to that the lock instrumentation you've been promoting? Why wont that work here? I do not see any reason why it cannot be started but left turned off till sufficient callers are not bound up in Giant. You are probably one of the few people who can do the VM properly (since you obviously dont like Alfred taking a shot at it), why do you have to go and reinvent what has already been done? > From my point of view, 80% of the work that has been done in P4 in > this area has been a complete and utter waste of time, Oh great, I guess that means the TrustedBSD and sparc64 ports (which are about 80% of the p4 tree usage) must be a complete and utter waste of time then. I guess we can can the UDF fs, the pgrp/session locking, tty locking, nfs, ia64 etc stuff as well. 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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