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authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>2014-07-30 16:08:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-07-30 17:16:13 -0700
commit52089b14c08f6ee9886c40b031712383fa24ddd9 (patch)
tree75dab80c770401054ef68a70461ca3e06e237c64
parent93a9eb39fad1b5fc9077776caa3af207883b254d (diff)
downloadlinux-52089b14c08f6ee9886c40b031712383fa24ddd9.tar.gz
hwpoison: call action_result() in failure path of hwpoison_user_mappings()
hwpoison_user_mappings() could fail for various reasons, so printk()s to print out the reasons should be done in each failure check inside hwpoison_user_mappings(). And currently we don't call action_result() when hwpoison_user_mappings() fails, which is not consistent with other exit points of memory error handler. So this patch fixes these messaging problems. Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Chen Yucong <slaoub@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/memory-failure.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 3db261fdee4..a013bc94ebb 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -911,8 +911,10 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn,
if (!page_mapped(hpage))
return SWAP_SUCCESS;
- if (PageKsm(p))
+ if (PageKsm(p)) {
+ pr_err("MCE %#lx: can't handle KSM pages.\n", pfn);
return SWAP_FAIL;
+ }
if (PageSwapCache(p)) {
printk(KERN_ERR
@@ -1235,7 +1237,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
*/
if (hwpoison_user_mappings(p, pfn, trapno, flags, &hpage)
!= SWAP_SUCCESS) {
- printk(KERN_ERR "MCE %#lx: cannot unmap page, give up\n", pfn);
+ action_result(pfn, "unmapping failed", IGNORED);
res = -EBUSY;
goto out;
}