Date: Wed, 21 Mar 2001 22:46:15 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Matt Dillon <dillon@earth.backplane.com> Cc: Mike Smith <msmith@FreeBSD.ORG>, arch@FreeBSD.ORG Subject: Re: remind me again, why is MAXPHYS only 128k ? Message-ID: <89599.985211175@critter> In-Reply-To: Your message of "Wed, 21 Mar 2001 13:38:08 PST." <200103212138.f2LLc8a21690@earth.backplane.com>
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In message <200103212138.f2LLc8a21690@earth.backplane.com>, Matt Dillon writes: > In anycase, my suggestion would be to leave it alone and instead work on > optimizing the RAW DEVICE I/O path to not be limited by MAXPHYS at all. > Increasing it to 256K might be possible, but increasing it to 1MB is > out of the question (insofar as being a default). Well, that is stuck on the b_pages field in the (p)buf's. I was wondering if we should make that a ** instead of a *[] so that it could be sized dynamically for pbufs. Hmm.... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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