Date: Fri, 01 Dec 2000 18:02:20 -0800 From: David Greenman <dg@root.com> To: mjacob@feral.com Cc: Andrew Gallatin <gallatin@cs.duke.edu>, Bosko Milekic <bmilekic@technokratis.com>, "Kenneth D. Merry" <ken@kdm.org>, arch@FreeBSD.ORG, alfred@FreeBSD.ORG Subject: Re: zero copy code review Message-ID: <200012020202.SAA14681@implode.root.com> In-Reply-To: Your message of "Fri, 01 Dec 2000 18:01:04 PST." <Pine.BSF.4.21.0012011758110.46782-100000@beppo.feral.com>
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> >> >> David Greenman writes: >> > Oops. The original assumption (and code that I wrote) was that M_WAIT >> > _cannot_ return a NULL pointer. This was changed in FreeBSD recently, and >> >> Yes, that's always been my assumption too. That's why I never noticed >> it... > >IIRC, this has never been guaranteed. It's often unlikely that a request can't >be satisfied after a sleep with the current code. FreeBSD blocked indefinitly and never returned a NULL pointer. -DG David Greenman Co-founder, The FreeBSD Project - http://www.freebsd.org President, TeraSolutions, Inc. - http://www.terasolutions.com Pave the road of life with opportunities. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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