X86: Fix mce offline page bug
c/s 19913 break mce offline page logic:
For page_state_is(pg, free), it's impossible to trigger the case;
For page_state_is(pg, offlined), it in fact didn't offline related page;
This patch fix the bug, and remove an ambiguous comment.
Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
diff -r 808735ebbb59 xen/common/page_alloc.c
--- a/xen/common/page_alloc.c Tue Mar 29 18:03:15 2011 +0800
+++ b/xen/common/page_alloc.c Wed Mar 30 14:44:55 2011 +0800
@@ -611,10 +611,6 @@ static void free_heap_pages(
/*
- * Following possible status for a page:
- * free and Online; free and offlined; free and offlined and broken;
- * assigned and online; assigned and offlining; assigned and offling and broken
- *
* Following rules applied for page offline:
* Once a page is broken, it can't be assigned anymore
* A page will be offlined only if it is free
@@ -711,14 +707,9 @@ int offline_page(unsigned long mfn, int
old_info = mark_page_offline(pg, broken);
- if ( page_state_is(pg, free) )
+ if ( page_state_is(pg, offlined) )
{
- /* Free pages are reserve directly */
reserve_heap_page(pg);
- *status = PG_OFFLINE_OFFLINED;
- }
- else if ( page_state_is(pg, offlined) )
- {
*status = PG_OFFLINE_OFFLINED;
}
else if ( (owner = page_get_owner_and_reference(pg)) )
mce_offline_page_fix.patch
Description: mce_offline_page_fix.patch
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