On Thu, Dec 24, 2015 at 08:17:15PM -0500, Sasha Levin wrote: > On 12/24/2015 08:12 PM, Dan Williams wrote: > > On Thu, Dec 24, 2015 at 5:10 PM, Sasha Levin <sasha.levin@xxxxxxxxxx> wrote: > >> > On 12/24/2015 06:51 AM, Kirill A. Shutemov wrote: > >>> >> This patch fixes regression caused by patch > >>> >> "mm, dax: dax-pmd vs thp-pmd vs hugetlbfs-pmd" > >>> >> > >>> >> The patch makes pmd_trans_huge() check and "page = pmd_page(*pmd)" after > >>> >> __split_huge_pmd_locked(). It can never succeed, since the pmd already > >>> >> points to a page table. As result the page is never get munlocked. > >>> >> > >>> >> It causes crashes like this: > >>> >> http://lkml.kernel.org/r/5661FBB6.6050307@xxxxxxxxxx > >> > > >> > So this patch didn't fix the issue for me. I've sent Kirill the trace > >> > off-list, but it's essentially the same thing. > > Can you send me the trace as well, and the reproducer? > > I don't have a simple reproducer, it reproduces rather quickly when running > under trinity within a KVM guest running a kernel I've attached the config > for. Is there a chance to get it reproduced with logs enabled in trinity? I failed to repoproduce it and code audit isn't fruitful so far. -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>