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Don't update referenced/modified bits if a page is entered using 

pmap_kenter_pa.  pmap(9) says unmanage mappings don't get referenced/modified
tracking, and this seems to stop me getting a panic while starting up with
root on NFS.
This commit is contained in:
bjh21 2001-10-13 14:23:31 +00:00
parent 6c2d977e6f
commit cc037046d6
1 changed files with 9 additions and 6 deletions
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15
sys/arch/arm26/arm26/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.32 2001/09/10 21:19:33 chris Exp $ */ /* $NetBSD: pmap.c,v 1.33 2001/10/13 14:23:31 bjh21 Exp $ */
/*- /*-
* Copyright (c) 1997, 1998, 2000 Ben Harris * Copyright (c) 1997, 1998, 2000 Ben Harris
* All rights reserved. * All rights reserved.
@ -105,7 +105,7 @@
#include <sys/param.h> #include <sys/param.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.32 2001/09/10 21:19:33 chris Exp $"); __KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.33 2001/10/13 14:23:31 bjh21 Exp $");
#include <sys/kernel.h> /* for cold */ #include <sys/kernel.h> /* for cold */
#include <sys/malloc.h> #include <sys/malloc.h>
@ -679,10 +679,13 @@ pmap_enter1(pmap_t pmap, vaddr_t va, paddr_t pa, vm_prot_t prot, int flags,
} }
if (unmanaged) if (unmanaged)
pv->pv_vflags |= PV_UNMANAGED; pv->pv_vflags |= PV_UNMANAGED;
if (flags & VM_PROT_WRITE) else {
ppv->pv_pflags |= PV_REFERENCED | PV_MODIFIED; /* According to pmap(9), unmanaged mappings don't track r/m */
else if (flags & (VM_PROT_ALL)) if (flags & VM_PROT_WRITE)
ppv->pv_pflags |= PV_REFERENCED; ppv->pv_pflags |= PV_REFERENCED | PV_MODIFIED;
else if (flags & (VM_PROT_ALL))
ppv->pv_pflags |= PV_REFERENCED;
}
pmap_update_page(ppn); pmap_update_page(ppn);
pmap->pm_entries[lpn] = pv; pmap->pm_entries[lpn] = pv;
if (pv->pv_vflags & PV_WIRED) if (pv->pv_vflags & PV_WIRED)