On Wed, Feb 25, 2015 at 12:30:48PM -0800, Andrew Morton wrote: > On Wed, 25 Feb 2015 22:21:30 +0200 "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx> wrote: > > > On Wed, Feb 25, 2015 at 12:54:54AM +0200, Aaro Koskinen wrote: > > > Hi, > > > > > > Here's a kernel config to reproduce the issue (no special steps needed, > > > just boot to userspace), and bootlog after that: > > > > > > # > > > # Automatically generated file; DO NOT EDIT. > > > # Linux/parisc 4.0.0-rc1 Kernel Configuration > > ... > > > [ 18.940000] BUG: non-zero nr_pmds on freeing mm: -6 > > > > It happens due missing __PAGETABLE_PMD_FOLDED in custom page table > > folding. This has been fixed in CONFIG_PGTABLE_LEVELS patcheset. > > > > Andrew, are you going to submit that patchset to Linus in this cycle? > > I wasn't planning on doing so - the changelog didn't say anything about > fixing any regressions. My bad. Patch 18/19 of the patchset introduced assert which checks that folded macros are not missed and fixed all cases which trigger it. > > If not, I can prepare a patchset which only adds missing > > __PAGETABLE_PUD_FOLDED and __PAGETABLE_PMD_FOLDED. > > Something simple would be preferred, but I don't know how much simpler > the above would be? Not much simplier: __PAGETABLE_PMD_FOLDED is missing in frv, m32r, m68k, mn10300, parisc and s390. -- 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>