From: Oscar Salvador <osalvador@xxxxxxx>
Subject: mm,hwpoison: refactor madvise_inject_error
Make a proper if-else condition for {hard,soft}-offline.
Link: https://lkml.kernel.org/r/20200908075626.11976-3-osalvador@xxxxxxx
Signed-off-by: Oscar Salvador <osalvador@xxxxxxxx>
Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Qian Cai <cai@xxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Aristeu Rozanski <aris@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Dmitry Yakunin <zeil@xxxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/madvise.c | 30 +++++++++++++-----------------
1 file changed, 13 insertions(+), 17 deletions(-)
--- a/mm/madvise.c~mmhwpoison-refactor-madvise_inject_error
+++ a/mm/madvise.c
@@ -872,7 +872,6 @@ static long madvise_remove(struct vm_are
static int madvise_inject_error(int behavior,
unsigned long start, unsigned long end)
{
- struct page *page;
struct zone *zone;
unsigned long size;
@@ -882,6 +881,7 @@ static int madvise_inject_error(int beha
for (; start < end; start += size) {
unsigned long pfn;
+ struct page *page;
int ret;
ret = get_user_pages_fast(start, 1, 0, &page);
@@ -903,25 +903,21 @@ static int madvise_inject_error(int beha
if (behavior == MADV_SOFT_OFFLINE) {
pr_info("Soft offlining pfn %#lx at process virtual address %#lx\n",
- pfn, start);
-
+ pfn, start);
ret = soft_offline_page(pfn, MF_COUNT_INCREASED);
- if (ret)
- return ret;
- continue;
+ } else {
+ pr_info("Injecting memory failure for pfn %#lx at process virtual address %#lx\n",
+ pfn, start);
+ /*
+ * Drop the page reference taken by get_user_pages_fast(). In
+ * the absence of MF_COUNT_INCREASED the memory_failure()
+ * routine is responsible for pinning the page to prevent it
+ * from being released back to the page allocator.
+ */
+ put_page(page);
+ ret = memory_failure(pfn, 0);
}
- pr_info("Injecting memory failure for pfn %#lx at process virtual address %#lx\n",
- pfn, start);
-
- /*
- * Drop the page reference taken by get_user_pages_fast(). In
- * the absence of MF_COUNT_INCREASED the memory_failure()
- * routine is responsible for pinning the page to prevent it
- * from being released back to the page allocator.
- */
- put_page(page);
- ret = memory_failure(pfn, 0);
if (ret)
return ret;
}
_
