From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793795972; b=aefBXfHbIT8wKTt27zy2pg4xFBwae8xfC+9wgIPZWU5UHFjLiy3SqGtdM2SjJW6zIyM3 SIi0Bhuz9Pvysn33H3ZgH8TKA6+HHiWZhVDNj0jMN0QK42/QJ3CPK9q1Jk7PtjI0hlovP fDfE0APH6WdrhT8IcWFAsqatvwQf+ZuTWzf8VKTf3GppNt51gCL1qZsIhgQM+BE+yOpKA wuDBEpmMNSC8mJ1kGZzOUWLt3X4+sJdulpgi3cBErjVUy60XrauDGkvCDmawCuSbqmbeZ iww6omDp0kzQPtzJiqkphiBlS5L4Z1P2UcVyxPgSvTAS/UKfwHwXQPF04s2fcDxLRtQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793795972; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=CLdabnqjRGqJbOryxnQw1FnEsduSPSMDms8rKrXUDp4=; b=kwSoOFE2/uZJo1QpJsKvzfN9aVFXUlAgEDXnUr+KjfdMAGJNhLT7FuWq/A7gdwu/rhJN 9nTBxK3zrB+G0I4cw/QKY8hT3QTGXZiX+4OyyBHK+946lZtxWaIBlwjXGzobRJyzJZY9q Ishb0VHI/giW3ajFsuv/hPB5obb8sJj/y8dQ16PvYlFmq+jgl2w410XYUErXVWsFZh5D9 76jmGlurTX4e8FsTi8Jx8JFXVdONTBFAhjqsyxaB1PUW+eGdm8SVz7yej/88rHCoGLeYJ DZ8imYJp9Xps73H0utlB/m94m4zYwcbHADDFLvLHbaG94ljot4aU8Ae2UKkJro3M8JA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=OPJBcqX0; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 900D6606A329 for ; Wed, 4 Nov 2026 12:39:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=OPJBcqX0 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7CFFF1F000C1; Wed, 4 Nov 2026 12:39:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793795972; bh=CLdabnqjRGqJbOryxnQw1FnEsduSPSMDms8rKrXUDp4=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=OPJBcqX0u2MFoxFVrLdBF5bM20IJvoNWvtntKMGm+5yvO9c7V0K1TpDcifno/7GDa ihNTIZFu9qmPvpdCHM/YZmKcgpXNSa+2I9sZftvfo0vdiaDdykmyH1ptvMPDFomWXu I9fB1pedPiycAv+pAlHL1Beut8rHjVN+AOl0Ww0BC7xJN6GrOat3h2U5834DK+jwEK 5r7BRw6rlOqfkEJeovbwKN/6d2/d56CxqU6QbX+nDX8g+aZyyVVs7qaDdk4fg86ota GtKgWtkEJAFkzIAYEl02cIkU91jDY2KQE/OClZ6QV+4RfuWlrNRqM5piNbIRBNDUi4 E5PVi9sqyW2rg== Date: Wed, 4 Nov 2026 13:39:25 +0100 From: "Oscar Salvador (SUSE)" To: Muchun Song Cc: Oscar Salvador , Andrew Morton , Mike Rapoport , Qi Zheng , Lance Yang , James Houghton , David Hildenbrand , Muchun Song , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 09/12] mm: hugetlb_vmemmap: make vmemmap optimization folio-oriented Message-ID: References: <20261104023510.260766-1-songmuchun@bytedance.com> <20261104023510.260766-10-songmuchun@bytedance.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261104023510.260766-10-songmuchun@bytedance.com> On Wed, Nov 04, 2026 at 10:35:07AM +0800, Muchun Song wrote: > Vmemmap optimization operates on one folio at a time, but the current > interface exposes a raw address range and requires the HugeTLB caller to > prepare part of the operation. This splits the common mechanism across > layers and obscures its natural unit of work. > > Make the folio the unit of vmemmap optimization and move the common > mechanics behind a folio-oriented interface. This keeps HugeTLB-specific > eligibility and state in the caller while making the remapping code > applicable to any eligible folio. > > No functional change intended. > > Signed-off-by: Muchun Song > Reviewed-by: Lance Yang > Reviewed-by: Qi Zheng > Reviewed-by: Mike Rapoport (Microsoft) Reviewed-by: Oscar Salvador -- Oscar Salvador SUSE Labs