diff options
| author | Richard Braun <rbraun@sceen.net> | 2032-05-29 18:10:39 +0200 |
|---|---|---|
| committer | Richard Braun <rbraun@sceen.net> | 2016-12-24 00:02:31 +0100 |
| commit | 1aa4ed6aaf69002b3bb7daed49cea8fa71536b66 (patch) | |
| tree | fdc4f483f9718c08e8beddf24dd9e1d2a9354692 | |
| parent | 11453089a1402932269b36f0b9f5831bcf888045 (diff) | |
VM: fix mapping removal on wired pages
Memory wiring is about to be reworked, at which point the VM system
will properly track wired mappings. Removing them when changing
protection makes sense, and is fine as long as the VM system
rewires them when access is restored.
* i386/intel/pmap.c (pmap_page_protect): Decrease wiring count instead
of causing a panic when removing a wired mapping.
| -rw-r--r-- | i386/intel/pmap.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/i386/intel/pmap.c b/i386/intel/pmap.c index b51aed9a..505b2063 100644 --- a/i386/intel/pmap.c +++ b/i386/intel/pmap.c @@ -1648,8 +1648,10 @@ void pmap_page_protect( /* * Remove the mapping, collecting any modify bits. */ - if (*pte & INTEL_PTE_WIRED) - panic("pmap_page_protect removing a wired page"); + + if (*pte & INTEL_PTE_WIRED) { + pmap->stats.wired_count--; + } { int i = ptes_per_vm_page; |