[Bug 243534] Kernel panics with "panic: invalid count 2" early during boot

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243534

Mark Johnston <markj at FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |markj at FreeBSD.org

--- Comment #5 from Mark Johnston <markj at FreeBSD.org> ---
sparc64's pmap_release() is freeing pages belonging to the TSB object, and the
new vm_page_free() contract requires the caller to busy the page.

diff --git a/sys/sparc64/sparc64/pmap.c b/sys/sparc64/sparc64/pmap.c
index 46454795ad26..753bd6af5aa1 100644
--- a/sys/sparc64/sparc64/pmap.c
+++ b/sys/sparc64/sparc64/pmap.c
@@ -1301,6 +1301,7 @@ pmap_release(pmap_t pm)
        while (!TAILQ_EMPTY(&obj->memq)) {
                m = TAILQ_FIRST(&obj->memq);
                m->md.pmap = NULL;
+               vm_page_xbusy(m);
                vm_page_unwire_noq(m);
                vm_page_free_zero(m);
        }

-- 
You are receiving this mail because:
You are the assignee for the bug.