Date: Sun, 01 Oct 2006 14:51:07 -0500 From: Alan Cox <alc@cs.rice.edu> To: Martin Blapp <mb@imp.ch> Cc: alc@freebsd.org, current@freebsd.org Subject: Re: CURRENT unusable again, too many panics Message-ID: <45201C2B.7080706@cs.rice.edu> In-Reply-To: <20061001132422.O91466@godot.imp.ch> References: <20060928195536.Y91466@godot.imp.ch> <20061001132422.O91466@godot.imp.ch>
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Martin Blapp wrote:
>
> After doing several compiles I found out that running HEAD of
>
> 1.10.2006 panics
>
> 1.5.2006 works,
>
> 1.7.2006 panics
>
> 1.6.2006 works
>
> So it's a commit between the 1st of June and 1st of July. I'll try
> now HEAD of 15.6.2006.
Can you tell me what if anything is printed with the attached patch applied?
Regards,
Alan
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filename="pmap_copy_printf.patch"
Index: i386/i386/pmap.c
===================================================================
RCS file: /home/ncvs/src/sys/i386/i386/pmap.c,v
retrieving revision 1.575
diff -p -u -r1.575 pmap.c
--- i386/i386/pmap.c 14 Aug 2006 15:39:41 -0000 1.575
+++ i386/i386/pmap.c 1 Oct 2006 19:14:20 -0000
@@ -2790,6 +2790,9 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pm
if (srcptepaddr & PG_PS) {
if (dst_pmap->pm_pdir[ptepindex] == 0) {
+ if (srcptepaddr & PG_W)
+ printf("pmap_copy: srcptepaddr = %#jx\n",
+ (uintmax_t)srcptepaddr);
dst_pmap->pm_pdir[ptepindex] = srcptepaddr &
~PG_W;
dst_pmap->pm_stats.resident_count +=
@@ -2821,6 +2824,9 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pm
if (*dst_pte == 0 &&
pmap_try_insert_pv_entry(dst_pmap, addr,
PHYS_TO_VM_PAGE(ptetemp & PG_FRAME))) {
+ if (ptetemp & PG_W)
+ printf("pmap_copy: ptetemp = %#jx\n",
+ (uintmax_t)ptetemp);
/*
* Clear the wired, modified, and
* accessed (referenced) bits
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