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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>
This commit is contained in:
Naoya Horiguchi 2014-07-30 16:08:30 -07:00 committed by Linus Torvalds
parent 93a9eb39fa
commit 52089b14c0
1 changed files with 4 additions and 2 deletions
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6
mm/memory-failure.c
View File

@ -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;
}