Date: Sat, 18 Aug 2012 21:36:46 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Matt Jacob <mjacob@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: BUFSIZ = 1024, still ? Message-ID: <6882.1345325806@critter.freebsd.dk> In-Reply-To: Your message of "Sat, 18 Aug 2012 14:12:32 MST." <50300540.9060906@feral.com>
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In message <50300540.9060906@feral.com>, Matthew Jacob writes: >[...] that there might be a measurable >difference for having to copy 4K (unaligned) than 1K (unaligned) to >kernel space for disposition. Actually, as far as I'm aware, the 4K would be page-aligned by default due to our malloc(3) implementation. >Wasn't there just a recent discussion about running 1.x binaries? 1.x binaries wouldn't notice and wouldn't be able to tell if BUFSIZ is different in 10.x >If you're going to talk about making a change to defaults, the default >MAXPHYS and DLFTPHYS have been undersized for years now. Indeed, but as I understand it, those require device driver changes ? -- 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.
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