linux-kernel - Re: [PATCHv2,6/7] mm: convert generic code to 5-level paging

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Message-ID: <15847703.KEZMYLnFVy@diego>
Date:   Tue, 14 Mar 2017 19:55:07 +0100
From:   Heiko Stübner <heiko@...ech.de>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
Cc:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Andrew Morton <akpm@...ux-foundation.org>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Andy Lutomirski <luto@...capital.net>,
        Michal Hocko <mhocko@...e.com>, linux-arch@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCHv2,6/7] mm: convert generic code to 5-level paging

Am Dienstag, 14. März 2017, 20:06:25 CET schrieb Kirill A. Shutemov:
> On Tue, Mar 14, 2017 at 05:14:22PM +0100, Heiko Stübner wrote:
> > [added arm64 maintainers and arm list to recipients]
> > 
> > Hi,
> > 
> > Am Donnerstag, 9. März 2017, 17:24:07 CET schrieb Kirill A. Shutemov:
> > > Convert all non-architecture-specific code to 5-level paging.
> > > 
> > > It's mostly mechanical adding handling one more page table level in
> > > places where we deal with pud_t.
> > > 
> > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> > > Acked-by: Michal Hocko <mhocko@...e.com>
> > 
> > This breaks (at least) arm64 Rockchip platforms it seems.
> > 
> > 4.11-rc1 worked just fine, while 4.11-rc2 kills the systems and I've
> > bisected it down to this one commit.
> 
> Have you tried current Linus' tree? There is important fix:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i
> d=ce70df089143c49385b4f32f39d41fb50fbf6a7c

thanks for the pointer ... my arm64 board seem to boot now again.

While I did look for responses to the original series [0] + [1], where there 
weren't any, I didn't think to just look into Linus' tree if there was some 
fixup already. 

So sorry for the noise and all seems well now
Heiko


[0] https://lkml.org/lkml/2017/3/9/442
[1] https://patchwork.kernel.org/patch/9613445/