Date: Sun, 13 Apr 2008 15:22:58 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Jeff Roberson <jroberson@jroberson.net> Cc: arch@freebsd.org Subject: Re: f_offset Message-ID: <1309.1208100178@critter.freebsd.dk> In-Reply-To: Your message of "Sat, 12 Apr 2008 22:24:22 -1000." <20080412221654.S959@desktop>
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In message <20080412221654.S959@desktop>, Jeff Roberson writes: >> The non p-prefix versions should always be serialized, because there >> is know way of knowing where they read/write if you don't. > >Well that's at odds with what the standard says and what others implement. >I think there is a clear case for serializing writes. I don't see what >advantage we get from serializing reads. The heavy cost of >synchronization should be justified by actual need. If you don't serialize read(2) and readv(2), how do you know where they read from ? -- 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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