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* [PATCH v1] mm/madvise: pass return code of memory_failure() to userspace
@ 2016-01-22  8:27 Naoya Horiguchi
  2016-01-26 23:27 ` Andrew Morton
  2016-01-27 13:59 ` Vlastimil Babka
  0 siblings, 2 replies; 5+ messages in thread
From: Naoya Horiguchi @ 2016-01-22  8:27 UTC (permalink / raw)
  To: Andrew Morton
  Cc: Chen Gong, linux-mm, linux-kernel, Naoya Horiguchi,
	Naoya Horiguchi

Currently the return value of memory_failure() is not passed to userspace, which
is inconvenient for test programs that want to know the result of error handling.
So let's return it to the caller as we already do in MADV_SOFT_OFFLINE case.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
---
 mm/madvise.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git v4.4-mmotm-2016-01-20-16-10/mm/madvise.c v4.4-mmotm-2016-01-20-16-10_patched/mm/madvise.c
index f56825b..6a77114 100644
--- v4.4-mmotm-2016-01-20-16-10/mm/madvise.c
+++ v4.4-mmotm-2016-01-20-16-10_patched/mm/madvise.c
@@ -555,8 +555,9 @@ static int madvise_hwpoison(int bhv, unsigned long start, unsigned long end)
 		}
 		pr_info("Injecting memory failure for page %#lx at %#lx\n",
 		       page_to_pfn(p), start);
-		/* Ignore return value for now */
-		memory_failure(page_to_pfn(p), 0, MF_COUNT_INCREASED);
+		ret = memory_failure(page_to_pfn(p), 0, MF_COUNT_INCREASED);
+		if (ret)
+			return ret;
 	}
 	return 0;
 }
-- 
2.7.0

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^ permalink raw reply related	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2016-01-28  5:50 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-01-22  8:27 [PATCH v1] mm/madvise: pass return code of memory_failure() to userspace Naoya Horiguchi
2016-01-26 23:27 ` Andrew Morton
2016-01-27  1:26   ` Naoya Horiguchi
2016-01-27 13:59 ` Vlastimil Babka
2016-01-28  5:49   ` Naoya Horiguchi

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