On Fri, Apr 13, 2018 at 09:31:44PM -0700, Matthew Wilcox wrote: > From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> > > Currently, we're only checking that a page is not compound when we're > setting or clearing a bit. We should probably be checking the page > isn't compound when testing the bit too. Well, we can definately try this, but I'm worried about false-positives in speculative code path. Maybe downgrade it WARN_ONCE() or something? -- Kirill A. Shutemov