Date: Thu, 20 Jul 2000 12:19:00 -0700 (PDT) From: Matthew Jacob <mjacob@feral.com> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: freebsd-alpha@freebsd.org Subject: Re: fxp0 hangs on a PC164 using STABLE Message-ID: <Pine.BSF.4.10.10007201218370.45768-100000@beppo.feral.com> In-Reply-To: <200007201911.PAA15726@gale.cs.duke.edu>
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On Thu, 20 Jul 2000, Andrew Gallatin wrote: > On the last, (putting in a memory barrier) -- I object because its implicit > in the atomic instructions & would be totally superfulous. An addition > to the comment to point this out might be appropriate though.. Okay. > WRT memory barriers on i86 -- I though that writes to device memory space > were uncachable & flushed the write buffers unless an mtrr was set > up for the region & it was made cacheable. I defer to the i86 experts.. Which could happen. > As for flushing writes to main memory for better device communication, > I have no clue.. > > Drew > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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