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 > <tipbot@xxxxxxxxx> wrote: > > Commit-ID: f2a6a7050109e0a5c7a84c70aa6010f682b2f1ee > > Gitweb: http://git.kernel.org/tip/f2a6a7050109e0a5c7a84c70aa6010f682b2f1ee > > Author: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> > > AuthorDate: Fri, 17 Mar 2017 21:55:15 +0300 > > Committer: Ingo Molnar <mingo@xxxxxxxxxx> > > 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.shutemov@xxxxxxxxxxxxxxx> > > Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > > Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx> > > Cc: Andy Lutomirski <luto@xxxxxxxxxx> > > Cc: Arnd Bergmann <arnd@xxxxxxxx> > > Cc: Borislav Petkov <bp@xxxxxxxxx> > > Cc: Brian Gerst <brgerst@xxxxxxxxx> > > Cc: Dave Hansen <dave.hansen@xxxxxxxxx> > > Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx> > > Cc: H. Peter Anvin <hpa@xxxxxxxxx> > > Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> > > Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > > Cc: Michal Hocko <mhocko@xxxxxxxx> > > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > Cc: linux-arch@xxxxxxxxxxxxxxx > > Cc: linux-mm@xxxxxxxxx > > Link: http://lkml.kernel.org/r/20170317185515.8636-7-kirill.shutemov@xxxxxxxxxxxxxxx > > Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> > > 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 -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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