Date: Thu, 19 Jul 2001 11:33:26 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.ORG> To: Terry Lambert <tlambert2@mindspring.com> Cc: Matthew Jacob <mjacob@feral.com>, hackers@FreeBSD.ORG, kuehl@lgk.de Subject: Re: x86 unaligned access followup. Message-ID: <XFMail.010719113326.jhb@FreeBSD.org> In-Reply-To: <3B5692BC.77E9D994@mindspring.com>
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On 19-Jul-01 Terry Lambert wrote: > kuehl@lgk.de wrote: >> > A "shakedown cruise" could end up being very rough... you >> > would effectively need to check an "unaligned access in >> > kernel is OK" flag in many of these instances, and fall back >> > to doing the copy when it was false. >> >> ...therefore - never mind. >> Perhaps some app code may break. ;-) > > The point was that this code breaks on some architectures > supported by FreeBSD anyway, and moving at least some of > the pain onto x86 people would end up minimizing that > breakage. > > Right now, being able to make a bug break all architectures > equally looks pretty good to people having to keep up with > the x86 port of FreeBSD's rate of breakage of others, like > the Alpha, when people with just x86 hardware break things > without knowing it. It is very rare that the alpha port is broken as you describe. Sometimes a bug will have a different affect on the alpha than on x86, but except for bugs in sys/alpha that x86'ers won't be committing, very few of the bugs break just the alpha and not the x86 as well. -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.Baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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