On Mon, Apr 24, 2017 at 9:57 AM, Kirill A. Shutemov <kir...@shutemov.name> wrote: > On Sun, Apr 23, 2017 at 12:56:14PM -0700, Dan Williams wrote: >> On Mon, Mar 27, 2017 at 3:25 AM, tip-bot for Kirill A. Shutemov >> <tip...@zytor.com> wrote: >> > Commit-ID: f2a6a7050109e0a5c7a84c70aa6010f682b2f1ee >> > Gitweb: >> > http://git.kernel.org/tip/f2a6a7050109e0a5c7a84c70aa6010f682b2f1ee >> > Author: Kirill A. Shutemov <kirill.shute...@linux.intel.com> >> > AuthorDate: Fri, 17 Mar 2017 21:55:15 +0300 >> > Committer: Ingo Molnar <mi...@kernel.org> >> > CommitDate: Mon, 27 Mar 2017 08:56:58 +0200 >> > >> > x86: Convert the rest of the code to support p4d_t >> > >> > This patch converts x86 to use proper folding of a new (fifth) page table >> > level >> > with <asm-generic/pgtable-nop4d.h>. >> > >> > That's a bit of a kitchen sink patch, but I don't see how to split it >> > further >> > without hurting bisectability. >> > >> > Signed-off-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com> >> > Acked-by: Thomas Gleixner <t...@linutronix.de> >> > Cc: Andrew Morton <a...@linux-foundation.org> >> > Cc: Andy Lutomirski <l...@amacapital.net> >> > Cc: Andy Lutomirski <l...@kernel.org> >> > Cc: Arnd Bergmann <a...@arndb.de> >> > Cc: Borislav Petkov <b...@alien8.de> >> > Cc: Brian Gerst <brge...@gmail.com> >> > Cc: Dave Hansen <dave.han...@intel.com> >> > Cc: Denys Vlasenko <dvlas...@redhat.com> >> > Cc: H. Peter Anvin <h...@zytor.com> >> > Cc: Josh Poimboeuf <jpoim...@redhat.com> >> > Cc: Linus Torvalds <torva...@linux-foundation.org> >> > Cc: Michal Hocko <mho...@suse.com> >> > Cc: Peter Zijlstra <pet...@infradead.org> >> > Cc: linux-a...@vger.kernel.org >> > Cc: linux...@kvack.org >> > Link: >> > http://lkml.kernel.org/r/20170317185515.8636-7-kirill.shute...@linux.intel.com >> > Signed-off-by: Ingo Molnar <mi...@kernel.org> >> >> Following Ingo's revert of commit 2947ba054a4d "x86/mm/gup: Switch GUP >> to the generic get_user_page_fast() implementation", I gave >> tip.git/master a try to see if it resolved the original failing >> signature I was seeing with the "device-dax" regression test [1] on >> next/master. It turns out that there are two failing signatures and I >> need to use the revert during the bisect to find this other >> regression. This new bisect points to commit f2a6a7050109 "x86: >> Convert the rest of the code to support p4d_t" as the culprit. >> >> [ 43.194330] BUG: unable to handle kernel paging request at >> ffff880300000000 > > I cannot reproduce the issue. > > Could you share your kernel kernel config?
Kernel config available here: https://gist.github.com/djbw/2b99a014396cca9f4406586573be98c0
