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Clear PG_WRITEABLE in vm_page_cache(). This may or may not be a bug,

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but the bit should definitely be cleared.
This commit is contained in:
dillon 1999-01-24 01:04:04 +00:00
parent 44c2f47425
commit e854781bc8
1 changed files with 7 additions and 2 deletions
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9
sys/vm/vm_page.c
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@ -34,7 +34,7 @@
* SUCH DAMAGE. * SUCH DAMAGE.
* *
* from: @(#)vm_page.c 7.4 (Berkeley) 5/7/91 * from: @(#)vm_page.c 7.4 (Berkeley) 5/7/91
* $Id: vm_page.c,v 1.117 1999/01/21 08:29:12 dillon Exp $ * $Id: vm_page.c,v 1.118 1999/01/21 10:01:49 dillon Exp $
*/ */
/* /*
@ -1039,7 +1039,6 @@ loop:
#if !defined(MAX_PERF) #if !defined(MAX_PERF)
if (m->dirty) if (m->dirty)
panic("found dirty cache page %p", m); panic("found dirty cache page %p", m);
#endif #endif
vm_page_busy(m); vm_page_busy(m);
vm_page_protect(m, VM_PROT_NONE); vm_page_protect(m, VM_PROT_NONE);
@ -1541,7 +1540,13 @@ vm_page_cache(m)
if ((m->queue - m->pc) == PQ_CACHE) if ((m->queue - m->pc) == PQ_CACHE)
return; return;
/*
* Remove all pmaps and indicate that the page is not
* writeable.
*/
vm_page_protect(m, VM_PROT_NONE); vm_page_protect(m, VM_PROT_NONE);
vm_page_flag_clear(m, PG_WRITEABLE);
#if !defined(MAX_PERF) #if !defined(MAX_PERF)
if (m->dirty != 0) { if (m->dirty != 0) {
panic("vm_page_cache: caching a dirty page, pindex: %d", m->pindex); panic("vm_page_cache: caching a dirty page, pindex: %d", m->pindex);