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Date: Mon, 16 Feb 2026 16:51:55 +0200
From: Mike Rapoport <rppt@kernel.org>
To: Kiryl Shutsemau <kas@kernel.org>
Cc: Dave Hansen <dave.hansen@intel.com>, Ard Biesheuvel <ardb@kernel.org>,
	Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
	Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Tom Lendacky <thomas.lendacky@amd.com>, x86@kernel.org,
	linux-efi@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, Moritz Sanft <ms@edgeless.systems>
Subject: Re: [PATCH 1/2] efi: Fix reservation of unaccepted memory table
Message-ID: <aZMvCxV45Uw8YPhT@kernel.org>
References: <20260213154838.46567-1-kas@kernel.org>
 <20260213154838.46567-2-kas@kernel.org>
 <b3b073e4-d51e-4fd7-ad7c-7465dab412b6@intel.com>
 <aY9Mf8oZODGiDoXp@thinkstation>
 <6d6dd421-774c-4f29-84d5-3e449240eb93@intel.com>
 <aY9c80nXefdXjGXh@thinkstation>
 <aZCaE04vDpf2hDEc@kernel.org>
 <aZMn5_uLLH61Fr6o@thinkstation>
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In-Reply-To: <aZMn5_uLLH61Fr6o@thinkstation>

On Mon, Feb 16, 2026 at 02:22:49PM +0000, Kiryl Shutsemau wrote:
> On Sat, Feb 14, 2026 at 05:51:47PM +0200, Mike Rapoport wrote:
> > > My guess that multiple memblock_add() calls might add up to the full
> > > page size.
> > 
> > I'm not following here. Can you explain what do you mean?
> > 
> > Multiple memblock_add() calls to adjacent ranges will coalesce into one
> > larger range. But I don't see how is that related.
> 
> I tried to find justification for the byte-level tracking by memblock.
> Not in relation to this case, but in general.

Probably somewhere deep in git archaeology :)

I presume to not waste a page for every small allocation.
 
> -- 
>   Kiryl Shutsemau / Kirill A. Shutemov

-- 
Sincerely yours,
Mike.