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Date: Wed, 19 Jun 2024 11:02:47 +0300
From: Mike Rapoport <rppt@kernel.org>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: Alexander Graf <graf@amazon.com>, Steven Rostedt <rostedt@goodmis.org>,
	linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Vincent Donnefort <vdonnefort@google.com>,
	Joel Fernandes <joel@joelfernandes.org>,
	Daniel Bristot de Oliveira <bristot@redhat.com>,
	Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>, suleiman@google.com,
	Thomas Gleixner <tglx@linutronix.de>,
	Vineeth Pillai <vineeth@bitbyteword.org>,
	Youssef Esmat <youssefesmat@google.com>,
	Beau Belgrave <beaub@linux.microsoft.com>,
	Baoquan He <bhe@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	David Howells <dhowells@redhat.com>
Subject: Re: [PATCH v6 0/2] mm/memblock: Add "reserve_mem" to reserved named
 memory at boot up
Message-ID: <ZnKQp_qd9oImOpUe@kernel.org>
References: <20240613155506.811013916@goodmis.org>
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 <049b2e0f-00b2-4704-8868-1569a006a134@amazon.com>
 <CAMj1kXF3AetyuLh-QU8yaE-wTLcgyzwuAwe-uo_3EqSDsAYhuQ@mail.gmail.com>
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In-Reply-To: <CAMj1kXF3AetyuLh-QU8yaE-wTLcgyzwuAwe-uo_3EqSDsAYhuQ@mail.gmail.com>

On Tue, Jun 18, 2024 at 12:21:19PM +0200, Ard Biesheuvel wrote:
> On Mon, 17 Jun 2024 at 23:01, Alexander Graf <graf@amazon.com> wrote:
>
> So I would personally prefer for this code not to go in at all. But if
> it does go in (and Steven has already agreed to this), it needs a
> giant disclaimer that it is best effort and may get broken
> inadvertently by changes that may seem unrelated.

I think that reserve_mem= is way less intrusive than memmap= we anyway
have.
It will reserve memory and the documentation adequately warns that the
location of that memory might be at different physical addresses.

-- 
Sincerely yours,
Mike.