On Mon, Apr 24, 2017 at 9:57 AM, Kirill A. Shutemov <[email protected]> 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 >> <[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?
Kernel config available here: https://gist.github.com/djbw/2b99a014396cca9f4406586573be98c0
