Date: Tue, 18 Apr 2000 19:41:26 -0500 From: Alan Cox <alc@cs.rice.edu> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Brian Fundakowski Feldman <green@freebsd.org>, Alfred Perlstein <bright@wintelcom.net>, Michael Reifenberger <root@nihil.plaut.de>, current@freebsd.org, alc@freebsd.org Subject: Re: Anyone able to verify the fix for (was Re: panic: vm_object_shadow: source object has OBJ_ONEMAPPING set.) Message-ID: <20000418194126.C2616@cs.rice.edu> In-Reply-To: <200004181736.KAA14683@apollo.backplane.com>; from Matthew Dillon on Tue, Apr 18, 2000 at 10:36:15AM -0700 References: <Pine.BSF.4.21.0004151755001.17351-100000@green.dyndns.org> <200004181736.KAA14683@apollo.backplane.com>
next in thread | previous in thread | raw e-mail | index | archive | help
This patch introduces a new bug. While it does guarantee that the assertion in vm_object_shadow isn't tripped over, it doesn't clear the OBJ_ONEMAPPING flag on the newly created shadow object. (New objects are created with OBJ_ONEMAPPING set.) Consequently, we'll have two overlapping mappings to the same shadow object that has OBJ_ONEMAPPING set. That's bad. The real problem is that the assertion is just plain wrong, not the code around it. It needs to be corrected or removed. Alan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20000418194126.C2616>