Date: Sat, 23 Aug 2008 17:15:38 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: "M. Warner Losh" <imp@bsdimp.com> Cc: freebsd-usb@freebsd.org Subject: Re: usb4bsd patch review Message-ID: <10826.1219511738@critter.freebsd.dk> In-Reply-To: Your message of "Sat, 23 Aug 2008 10:01:55 CST." <20080823.100155.1310242209.imp@bsdimp.com>
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In message <20080823.100155.1310242209.imp@bsdimp.com>, "M. Warner Losh" writes : >While this may be a good idea, I'm hesitant about races that it may >introduce. This is the classic point of attack: do something between >steps of a formerly atomic operation that was made non-atomic. I >can't think of anything off the top of my head, but I'm still >concerned. We have ways of closing the race if need be, but they're all slightly kludgy, but I am not overly concerned about those races as long as the default is to not give access. -- 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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