The patch titled
mm debug: dump pageframes on bad_page()
has been removed from the -mm tree. Its filename was
mm-debug-dump-pageframes-on-bad_page.patch
This patch was dropped because it gets rejects and I don't recall ever learning anything from it...
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: mm debug: dump pageframes on bad_page()
From: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff -puN mm/page_alloc.c~mm-debug-dump-pageframes-on-bad_page mm/page_alloc.c
--- a/mm/page_alloc.c~mm-debug-dump-pageframes-on-bad_page
+++ a/mm/page_alloc.c
@@ -231,6 +231,21 @@ static void bad_page(struct page *page)
printk(KERN_EMERG "Trying to fix it up, but a reboot is needed\n"
KERN_EMERG "Backtrace:\n");
dump_stack();
+ {
+ int i;
+ unsigned char *ptr = (unsigned char *)page;
+ ptr -= 64;
+
+ printk(KERN_EMERG "Hexdump:");
+ for (i=0;i<192;i++) {
+ if ((i%16) == 0) {
+ printk("\n");
+ printk(KERN_EMERG "%03x:", i);
+ }
+ printk(" %02x", ptr[i]);
+ }
+ printk("\n");
+ }
page->flags &= ~PAGE_FLAGS_CLEAR_WHEN_BAD;
set_page_count(page, 0);
reset_page_mapcount(page);
_
Patches currently in -mm which might be from manfred@xxxxxxxxxxxxxxxx are
repeatable-slab-corruption-with-ltp-msgctl08.patch
mm-debug-dump-pageframes-on-bad_page.patch
slab-leaks3-default-y.patch
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