Date: Wed, 30 Jun 2021 14:12:27 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 256806] panic: vm_page_free_prep: freeing mapped page Message-ID: <bug-256806-227-7ly3gKnIn7@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-256806-227@https.bugs.freebsd.org/bugzilla/> References: <bug-256806-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256806 --- Comment #9 from Mark Johnston <markj@FreeBSD.org> --- (In reply to Niels Bakker from comment #8) The mapping address is the same as the beginning of the vm_map_entry range.= I believe it isn't possible for a page to be mapped into the pmap after the pmap_remove() call, since we're in execve and other threads are suspended. One other possibility is that the PTE was damaged somehow (e.g., due to a hardware bit-flip), so PG_V is clear and pmap_remove() skipped it.=20 Unfortunately, I think we can't check this because page table pages are not included in minidumps. Has the panic occurred more than once? --=20 You are receiving this mail because: You are the assignee for the bug.=
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