lkml.org 
[lkml]   [2020]   [Sep]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 4/7] mm,hwpoison: refactor madvise_inject_error
Date
Make a proper if-else condition for {hard,soft}-offline.

[akpm: remove zone variable and refactor comment]
Signed-off-by: Oscar Salvador <osalvador@suse.com>
---
mm/madvise.c | 32 ++++++++++++++------------------
1 file changed, 14 insertions(+), 18 deletions(-)

diff --git a/mm/madvise.c b/mm/madvise.c
index 4d87b31a1576..4a48f7215195 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -869,8 +869,6 @@ static long madvise_remove(struct vm_area_struct *vma,
static int madvise_inject_error(int behavior,
unsigned long start, unsigned long end)
{
- struct page *page;
- struct zone *zone;
unsigned long size;

if (!capable(CAP_SYS_ADMIN))
@@ -879,6 +877,7 @@ static int madvise_inject_error(int behavior,

for (; start < end; start += size) {
unsigned long pfn;
+ struct page *page;
int ret;

ret = get_user_pages_fast(start, 1, 0, &page);
@@ -895,25 +894,22 @@ static int madvise_inject_error(int behavior,

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;
}
--
2.26.2
\
 
 \ /
  Last update: 2020-09-17 10:30    [W:0.136 / U:1.868 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site