Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Sun, 09 Oct 2022 03:20:59 +0100
Message-ID: <87sfjxhh4k.wl-maz@kernel.org>
From:   Marc Zyngier <maz@kernel.org>
To:     Denis Nikitin <denik@chromium.org>
Cc:     Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        James Morse <james.morse@arm.com>,
        Alexandru Elisei <alexandru.elisei@arm.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        David Brazdil <dbrazdil@google.com>,
        linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu,
        linux-kernel@vger.kernel.org, Manoj Gupta <manojgupta@google.com>
Subject: Re: [PATCH v2] KVM: arm64: nvhe: Fix build with profile optimization
In-Reply-To: <CADDJ8CV83d4tYeLnQH-hHjzBfED6EBo4Z70q5A=9cwO+Lp1sNQ@mail.gmail.com>
References: <20220920082005.2459826-1-denik@chromium.org>
        <20220922053145.944786-1-denik@chromium.org>
        <87h70zk83g.wl-maz@kernel.org>
        <CADDJ8CW0QgHtp1rwk=ZqrcuWZ4_L8KQh26VaEfcBQS0Tx9+ZYg@mail.gmail.com>
        <CAH=Qcsi3aQ51AsAE0WmAH9VmpqjOaQQt=ru5Nav4+d8F3fMPwQ@mail.gmail.com>
        <CADDJ8CXObkhMvOx+L29awjtt7tiaTWxFrRxOmhUqvzku1wswHw@mail.gmail.com>
        <CADDJ8CV83d4tYeLnQH-hHjzBfED6EBo4Z70q5A=9cwO+Lp1sNQ@mail.gmail.com>
User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue)
 FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.1
 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO)
MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue")
Content-Type: text/plain; charset=US-ASCII
Precedence: bulk

On Thu, 06 Oct 2022 17:28:17 +0100,
Denis Nikitin <denik@chromium.org> wrote:
> 
> Hi Mark,

s/k/c/

> 
> This problem currently blocks the PGO roll on the ChromeOS kernel and
> we need some kind of a solution.

I'm sorry, but I don't feel constrained by your internal deadlines. I
have my own...

> Could you please take a look?

I have asked for a reproducer. All I got for an answer is "this is
hard". Providing a profiling file would help, for example.

	M.

-- 
Without deviation from the norm, progress is not possible.