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mm: hwpoison: dump page for unhandlable page 

Currently just very simple message is shown for unhandlable page, e.g.
non-LRU page, like: soft_offline: 0x1469f2: unknown non LRU page type
5ffff0000000000 ()

It is not very helpful for further debug, calling dump_page() could show
more useful information.

Calling dump_page() in get_any_page() in order to not duplicate the call
in a couple of different places.  It may be called with pcp disabled and
holding memory hotplug lock, it should be not a big deal since hwpoison
handler is not called very often.

[shy828301@gmail.com: remove redundant pr_info per Noaya Horiguchi]
  Link: https://lkml.kernel.org/r/20210824020946.195257-3-shy828301@gmail.com

Link: https://lkml.kernel.org/r/20210819054116.266126-3-shy828301@gmail.com
Signed-off-by: Yang Shi <shy828301@gmail.com>
Suggested-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: David Mackey <tdmackey@twitter.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yang Shi 2021-09-02 14:58:37 -07:00 committed by Linus Torvalds
parent f653312169
commit 941ca063eb
1 changed files with 3 additions and 3 deletions
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6
mm/memory-failure.c
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@ -1228,6 +1228,9 @@ static int get_any_page(struct page *p, unsigned long flags)
ret = -EIO; ret = -EIO;
} }
out: out:
if (ret == -EIO)
dump_page(p, "hwpoison: unhandlable page");
return ret; return ret;
} }
@ -2205,9 +2208,6 @@ int soft_offline_page(unsigned long pfn, int flags)
try_again = false; try_again = false;
goto retry; goto retry;
} }
} else if (ret == -EIO) {
pr_info("%s: %#lx: unknown page type: %lx (%pGp)\n",
__func__, pfn, page->flags, &page->flags);
} }
return ret; return ret;