On Wed, Apr 22, 2015 at 03:12:19PM +0200, Borislav Petkov wrote:
> On Sun, Apr 19, 2015 at 12:08:03AM +0200, Borislav Petkov wrote:
> > On Sat, Apr 18, 2015 at 05:59:53PM -0400, Linus Torvalds wrote:
> > > On Sat, Apr 18, 2015 at 5:56 PM, Kirill A. Shutemov
> > > <kirill@xxxxxxxxxxxxx> wrote:
> > > >
> > > > Andrea has already seen the bug and pointed to 8d63d99a5dfb as possible
> > > > cause. I don't see why the commit could broke anything, but it worth
> > > > trying to revert and test.
> > >
> > > Ahh, yes, that does look like a more likely culprit.
> >
> > Reverted and building... will report in the next days.
>
> FWIW, box is solid with the revert and has an uptime of ~4 days so far
> without hickups.
Could you try patch below instead? This can give a clue what's going on.
diff --git a/mm/swap.c b/mm/swap.c
index a7251a8ed532..0dff7004aa25 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -131,7 +131,11 @@ void put_unrefcounted_compound_page(struct page *page_head, struct page *page)
* here, see the comment above this function.
*/
VM_BUG_ON_PAGE(!PageHead(page_head), page_head);
- VM_BUG_ON_PAGE(page_mapcount(page) != 0, page);
+ if (page_mapcount(page) != 0) {
+ dump_page(page_head, NULL);
+ dump_page(page, NULL);
+ BUG();
+ }
if (put_page_testzero(page_head)) {
/*
* If this is the tail of a slab THP page,
--
Kirill A. Shutemov
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