Date: Tue, 02 Dec 1997 19:07:04 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: current@FreeBSD.ORG Subject: Re: cvs commit: src/sys/kern vfs_aio.c Message-ID: <2923.881086024@critter.freebsd.dk> In-Reply-To: Your message of "Tue, 02 Dec 1997 09:06:20 PST." <199712021706.JAA28517@kithrup.com>
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>>And yes, the reason is performance. > >Then you should back the changes out IMMEDIATELY, as > > *retval = 10; > >is exactly the same speed as: > > p->p_retval[0] = 10; BZZZTT! Wrong answer. We save the time it takes to push the &retval on the stack on ALL syscalls. -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop."
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