From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B0B6F3BB5A; Mon, 24 Nov 2025 10:47:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763981244; cv=none; b=SieBVKGyGz0182WR6mDbsDUkUsimhCQREPOQawgq1xIU1chMNfw4a/gMHbvM6e2/zTjvfwBjo1qtGtFCQYkcs72TJYmmEIZK6usnIgQt/eelfbJQs2I7UQAkqDdwkc+et/AyQWaHfLLNafLcZmeOFPnk/GcimZa04229AjO/nsI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763981244; c=relaxed/simple; bh=6nxKEIZkVhailrIiW3XSVoQ+gWVPu3eKDnFphZtX1us=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=FOkpLOHJoIxjiTNkSwUNLqybTwEpB24uD4U+nUIFmUm5LLKqMLtn1ipSUCOkHtVl11rgDzYtQMMh+VcRO9ux84FifHPSUP7Bq428N3DVecxSmVdUPblG8mbGUcZ9z8jzcyI2O+Z/qzpciKpkOwJDVTmCuSbTbw5DfjxmDzGhUoM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=B2ko+iEi; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="B2ko+iEi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E2C77C4CEF1; Mon, 24 Nov 2025 10:47:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763981244; bh=6nxKEIZkVhailrIiW3XSVoQ+gWVPu3eKDnFphZtX1us=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=B2ko+iEidiYGhvL3YmKCCuGt/1FAZGeXdFxjG6LTjNuCRFsjNc6VR40iFUsFsFuf7 vtXLMwfFBgw8gTF2AgGo/NlhU9LF8iHWcC5axSVGFSapMdg+VC/Lg7kjnRF6zOhyua s3Se6r+3s4koBGppGnlbPoGOENiYWAykiE6wrK7Sw4v5RgWG3mZysysonlHbvnq3tU B10Cn5j99q6ZRrVpMhK6d+le2etUfRyWojoe33smrqjQQD9IbwBDexOfGr1xudZvcX lxa0fdPSP6KQQeMcDRYWzwL2ioy1UWsVhwtM2JPMipUCQQEdHYoqzJ/17iw6I7NZ8g y+ptXYfDRaCSg== Message-ID: <1a2329ef-50ff-4e48-87b4-3adc70ee8833@kernel.org> Date: Mon, 24 Nov 2025 11:47:17 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] pagemap: Update BUDDY flag documentation To: Richard Weinberger , linux-mm@kvack.org Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, corbet@lwn.net, mhocko@suse.com, surenb@google.com, rppt@kernel.org, vbabka@suse.cz, Liam.Howlett@oracle.com, lorenzo.stoakes@oracle.com, akpm@linux-foundation.org, Vladimir Davydov , Konstantin Khlebnikov , Naoya Horiguchi , Linus Torvalds References: <20251122211920.3410371-1-richard@nod.at> From: "David Hildenbrand (Red Hat)" Content-Language: en-US In-Reply-To: <20251122211920.3410371-1-richard@nod.at> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 11/22/25 22:19, Richard Weinberger wrote: > Since v4.6 the BUDDY flag is set for _all_ pages in the block > and no longer just for the first one. > This change was introduced by: > commit 832fc1de01ae ("/proc/kpageflags: return KPF_BUDDY for "tail" buddy pages") > > Strictly speaking, this was an ABI change, but as nobody has noticed > since 2016, let's just update the documentation. > > Cc: Vladimir Davydov > > Cc: Konstantin Khlebnikov > Cc: Naoya Horiguchi > Cc: Andrew Morton > Cc: Linus Torvalds > Signed-off-by: Richard Weinberger > --- Acked-by: David Hildenbrand (Red Hat) -- Cheers David