linux-kernel - Re: [PATCH 0/4] x86/mm/cpa: Fix cpa-array TLB invalidation

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Date:   Fri, 30 Nov 2018 16:23:47 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     "StDenis, Tom" <Tom.StDenis@....com>
Cc:     "dave.hansen@...el.com" <dave.hansen@...el.com>,
        "luto@...nel.org" <luto@...nel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Deucher, Alexander" <Alexander.Deucher@....com>
Subject: Re: [PATCH 0/4] x86/mm/cpa: Fix cpa-array TLB invalidation

On Fri, Nov 30, 2018 at 03:14:30PM +0000, StDenis, Tom wrote:
> On 2018-11-30 10:09 a.m., Peter Zijlstra wrote:
> > On Fri, Nov 30, 2018 at 02:52:26PM +0000, StDenis, Tom wrote:
> >> Hi Peter,
> >>
> >> Unfortunately I can't apply this on top of our drm-next the first patch
> >> fails.
> > 
> > Against what tree would you like the patches? rebasing should not be
> > hard I think.
> > 
> 
> Actually I just tried applying against the tip of master and got the 
> same errors...
> 
> [root@...rizo linux]# git apply \[PATCH\ 1_4\]\ x86_mm_cpa\:\ Add\ 
> __cpa_addr\(\)\ helper\ -\ Peter\ Zijlstra\ \<peterz@...radead.org\>\ -\ 
> 2018-11-30\ 0844.eml
> error: patch failed: arch/x86/mm/pageattr.c:228
> error: arch/x86/mm/pageattr.c: patch does not apply
> 
> 
> Any ideas?

Hurm.. no. They apply cleanly to Linus' tree here.

linux-2.6$ git describe
v4.20-rc4-156-g94f371cb7394
linux-2.6$ quilt push 4
Applying patch patches/peterz-cpa-addr.patch
patching file arch/x86/mm/pageattr.c
Applying patch patches/peterz-cpa-fix-flush_array.patch
patching file arch/x86/mm/mm_internal.h
patching file arch/x86/mm/pageattr.c
patching file arch/x86/mm/tlb.c
Applying patch patches/peterz-cpa-fold-cpa_flush.patch
patching file arch/x86/mm/pageattr.c
Applying patch patches/peterz-cpa-clflush_opt.patch
patching file arch/x86/mm/pageattr.c
Now at patch patches/peterz-cpa-clflush_opt.patch

Weird.