[Crash-utility] [PATCH v4 4/4] Avoid dump_mem_map when there is no page
Physical address regions above the System RAM size doesn't
have associated page descriptors. In such cases we shouldn't
invoke dump_mem_map().
After the patch :
crash> vtop d1002000
VIRTUAL PHYSICAL
d1002000 20ec00000
PAGE DIRECTORY: c0578000
PGD: c0579a20 => c784b000
PMD: c784b000 => c784b010
PTE: c784b010 => 20ec0051b
PAGE: 20ec00000
PTE PHYSICAL FLAGS
20ec0051b 20ec00000 (PRESENT|USER|GUARDED|COHERENT|ACCESSED)
crash>
Signed-off-by: Dave Anderson <anderson(a)redhat.com>
Signed-off-by: Suzuki K. Poulose <suzuki(a)in.ibm.com>
---
memory.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/memory.c b/memory.c
index 55a184b..84ae1b5 100755
--- a/memory.c
+++ b/memory.c
@@ -2796,7 +2796,7 @@ void
do_vtop(ulong vaddr, struct task_context *tc, ulong vtop_flags)
{
physaddr_t paddr;
- ulong vma;
+ ulong vma, page;
int page_exists;
struct meminfo meminfo;
char buf1[BUFSIZE];
@@ -2930,7 +2930,7 @@ do_vtop(ulong vaddr, struct task_context *tc, ulong vtop_flags)
fprintf(fp, "\n");
- if (page_exists) {
+ if (page_exists && phys_to_page(paddr, &page)) {
if ((pc->flags & DEVMEM) && (paddr >= VTOP(vt->high_memory)))
return;
BZERO(&meminfo, sizeof(struct meminfo));