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 > <[email protected]> wrote: > > Commit-ID: f2a6a7050109e0a5c7a84c70aa6010f682b2f1ee > > Gitweb: > > http://git.kernel.org/tip/f2a6a7050109e0a5c7a84c70aa6010f682b2f1ee > > Author: Kirill A. Shutemov <[email protected]> > > AuthorDate: Fri, 17 Mar 2017 21:55:15 +0300 > > Committer: Ingo Molnar <[email protected]> > > 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 <[email protected]> > > Acked-by: Thomas Gleixner <[email protected]> > > Cc: Andrew Morton <[email protected]> > > Cc: Andy Lutomirski <[email protected]> > > Cc: Andy Lutomirski <[email protected]> > > Cc: Arnd Bergmann <[email protected]> > > Cc: Borislav Petkov <[email protected]> > > Cc: Brian Gerst <[email protected]> > > Cc: Dave Hansen <[email protected]> > > Cc: Denys Vlasenko <[email protected]> > > Cc: H. Peter Anvin <[email protected]> > > Cc: Josh Poimboeuf <[email protected]> > > Cc: Linus Torvalds <[email protected]> > > Cc: Michal Hocko <[email protected]> > > Cc: Peter Zijlstra <[email protected]> > > Cc: [email protected] > > Cc: [email protected] > > Link: > > http://lkml.kernel.org/r/[email protected] > > Signed-off-by: Ingo Molnar <[email protected]> > > 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? -- Kirill A. Shutemov
