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Date:   Thu, 27 Jun 2019 22:47:37 -0700 (PDT)
From:   Paul Walmsley <paul.walmsley@sifive.com>
To:     Atish Patra <atish.patra@wdc.com>, Ingo Molnar <mingo@redhat.com>
cc:     linux-kernel@vger.kernel.org,
        Christoph Hellwig <hch@infradead.org>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Thomas Gleixner <tglx@linutronix.de>,
        Kees Cook <keescook@chromium.org>,
        Changbin Du <changbin.du@intel.com>,
        Anup Patel <anup@brainfault.org>,
        Palmer Dabbelt <palmer@sifive.com>,
        "maintainer:X86 ARCHITECTURE 32-BIT AND 64-BIT" <x86@kernel.org>,
        linux-mm@kvack.org, Borislav Petkov <bp@alien8.de>,
        Vlastimil Babka <vbabka@suse.cz>, Gary Guo <gary@garyguo.net>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-riscv@lists.infradead.org,
        Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Subject: Re: [PATCH v3 1/3] x86: Move DEBUG_TLBFLUSH option.
In-Reply-To: <20190429212750.26165-2-atish.patra@wdc.com>
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References: <20190429212750.26165-1-atish.patra@wdc.com> <20190429212750.26165-2-atish.patra@wdc.com>
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On Mon, 29 Apr 2019, Atish Patra wrote:

> CONFIG_DEBUG_TLBFLUSH was added in
> 
> 'commit 3df3212f9722 ("x86/tlb: add tlb_flushall_shift knob into debugfs")'
> to support tlb_flushall_shift knob. The knob was removed in
> 
> 'commit e9f4e0a9fe27 ("x86/mm: Rip out complicated, out-of-date, buggy
> TLB flushing")'.
> However, the debug option was never removed from Kconfig. It was reused
> in commit
> 
> '9824cf9753ec ("mm: vmstats: tlb flush counters")'
> but the commit text was never updated accordingly.
> 
> Update the Kconfig option description as per its current usage.
> 
> Take this opportunity to make this kconfig option a common option as it
> touches the common vmstat code. Introduce another arch specific config
> HAVE_ARCH_DEBUG_TLBFLUSH that can be selected to enable this config.

Looks like this one still needs to be merged or acked by one of the x86 
maintainers?


- Paul