Date: Thu, 29 Jan 1998 09:01:50 -0700 From: "Justin T. Gibbs" <gibbs@plutotech.com> To: Bruce Evans <bde@zeta.org.au> Cc: mike@smith.net.au, cvs-all@FreeBSD.ORG, cvs-committers@FreeBSD.ORG, cvs-sys@FreeBSD.ORG Subject: Re: cvs commit: src/sys/i386/isa wfd.c Message-ID: <199801291604.JAA05105@pluto.plutotech.com> In-Reply-To: Your message of "Fri, 30 Jan 1998 02:44:28 %2B1100." <199801291544.CAA01875@godzilla.zeta.org.au>
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>Some of them can only can only handle 16 scatter-gather segments, so >they can only handle transfer sizes <= 64K, which is currently MAXPHYS/2. >They are never asked to handle > 64K because filesystem block sizes are >limited to MAXBSIZE = 64K and raw i/o sizes are limited to DFLTPHYS = 64K. And may not be able to handle even 64k if the raw I/O is not page aligned. >Bruce -- Justin
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