Date: Wed, 16 May 2001 22:50:59 +0200 From: Tor.Egge@fast.no To: dillon@earth.backplane.com Cc: arch@FreeBSD.ORG Subject: Re: on load control / process swapping Message-ID: <200105162050.WAA01047@midten.fast.no> In-Reply-To: Your message of "Wed, 16 May 2001 13:31:46 -0700 (PDT)" References: <200105162031.f4GKVkd77205@earth.backplane.com>
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> Ok, I've done a quick once-over of the patch and I have a question: > What happens if you've just written that file normally and there are > still some uncomitted dirty buffers associated with it, and you then > do an O_DIRECT read of the file? Do you get the old data or the new > data? Currently, you get the old data. That's both semantically incorrect and a security hole. Some check for dirty buffers should be made if the OBJ_MIGHTBEDIRTY flag is set on the vm object. - Tor Egge To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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