Date: Sat, 15 Apr 2000 18:12:22 -0400 (EDT) From: Brian Fundakowski Feldman <green@FreeBSD.org> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Alfred Perlstein <bright@wintelcom.net>, Michael Reifenberger <root@nihil.plaut.de>, current@FreeBSD.ORG, alc@FreeBSD.ORG Subject: Re: panic: vm_object_shadow: source object has OBJ_ONEMAPPING set. Message-ID: <Pine.BSF.4.21.0004151810080.17351-100000@green.dyndns.org> In-Reply-To: <200004151823.LAA79731@apollo.backplane.com>
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On Sat, 15 Apr 2000, Matthew Dillon wrote: > Note that the ref_count == 1 test in the vm_object_shadow optimization > should be left intact. This optimization requires a much stricter set > of tests because we do not want to assume sharability of an object > if someone else (the 'else' being 'someone unknown to us') has a reference > on it, even if OBJ_ONEMAPPING is set. The KASSERT is broken in another way, BTW: it has undefined (read: panic before the test even occurs) results if source is NULL, which vm_object_shadow otherwise handles. I don't know why it's never been tripped on, though... > -Matt > Matthew Dillon > <dillon@backplane.com> -- Brian Fundakowski Feldman \ FreeBSD: The Power to Serve! / green@FreeBSD.org `------------------------------' To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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