Date: Mon, 6 Mar 1995 08:28:22 -0500 From: starkhome!gene@sbstark.cs.sunysb.edu (Gene Stark) To: davidg@Root.COM Cc: current@FreeBSD.org, dyson@Root.COM Subject: Page fault panics during make world in -current Message-ID: <199503061328.IAA03874@starkhome.cs.sunysb.edu> In-Reply-To: David Greenman's message of Sun, 05 Mar 1995 18:45:07 -0800 <199503060245.SAA00283@corbin.Root.COM>
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A little more info from my crash dump: I notice that control has arrived at line 1005 in vfs_bio.c with "obj" set to a VM object with ref_count = 0, even though the object was obtained from vp->v_vmdata. It seems wrong to have a pointer to a VM object stored in a vnode without a positive reference count on the VM object. The size field of the VM object also seems bogus: 0xf0668da4, though this could perhaps be a consequence of the object's already having been freed and the memory used for something else. So, it looks like maybe there is a problem with the updating of the reference counts when storing VM object pointers in vnodes. - Gene
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