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=1793257428; b=M6tqlHWG7qMn/MCgH1Iy81gbb0CkebkQDwKoLvncapyDeYwjZE6mSDpoHItUcH1NU6oh uDDJSbf8QdhyRQWq9MQcXY1FgQz3tBwxyit8MaHbXBRyebHY8OqIiAllnyxgRbq0aLILv /ykE2ng3AsqQyK9PI1Zkf+zcRxmGGsbx0Cd3Wz0PQaHO5MBYHgT95PmqA6DCI8xjgV4rY A+JVWZhuI3rXY3yNki4+zWdb6cn7F/6U1DZMPRxVKq0NeKmjbCbasKi7M+jtYc3Y/4+gy uvZfYWbHR3dNdUZz/rMRNTd4jmMWKWjN/Un6YKlwWTO5hGtewdm8cUkJHal9NbrHaLg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793257428; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=yl7DWqvy0CCg289e/p2GYHI3s+4vg6zhNzPzSHj/8eU=; b=vCuPulZmwAAj1O25kTeSuMV4H80d2l2QuU7FkvIVEdF8x/V5K5YTWcbF6LLFQYBOcC9L DMJVyQnGQQIhXvTd02BdwagKy2gy4EjyJ+sCsxfq2Cg0nLP5NkoNdFdQne3Hj66slxZ4O wfvvrG6S7Iic/H08Bm1/qnhvrTiK2Ym9tHMmvG2xBxBHsE850ExnUyyOuhkj7avs1ZlKG 2oBTdhrgbdwqcebDzRJSVekfh/y/agm/qpMildfBDR8s1eYGlUerQfit/eFEGeTlHLJaY 0MVr0HJ02JXU4Sh+DCRgOpRpXJ2GyfCThTwNDSc0AnlbbHU4SxCbRL0kqhfjxwaLTGA== 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=aXDJX3+S; 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 E0D51606A32D; Thu, 29 Oct 2026 07:03:47 +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=aXDJX3+S Received: by smtp.kernel.org (Postfix) with ESMTPSA id A86371F031EC; Thu, 29 Oct 2026 07:03:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793257427; bh=yl7DWqvy0CCg289e/p2GYHI3s+4vg6zhNzPzSHj/8eU=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=aXDJX3+S9WIGkm05gxDG+G7h6G9o1lZSrnw9kz6XyaMf8koBUlYtvUfzu1qHRZ6lb WG1Xwz8z5yn7HZcnc1Oqd5EwZUfzFzd7B3AyrzdswWtVIbC/yGtzElHATIuW4X6vfF QnvNdzTXm5FIk4QtITgIA/Ou4XrE7x7ydTOqixUsmjt5ZOFE9qu04vTB3GphMWSgFu ugpg2oeWF4xklDA3WStjin0tc4jcUEBi+kT7f9WCnM1hvTDv274SvaZd209AH1SkTF yhzciNJMM2g7i8aMhHeT9f0ULM/8icua8SuvmHAHXBxBj3riVaQ3Z2aD2v7vME9LeD /bH8RVmr3dfbA== Date: Thu, 29 Oct 2026 09:03:39 +0200 From: Mike Rapoport To: Muchun Song Cc: Andrew Morton , Dan Williams , David Hildenbrand , linux-mm@kvack.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-cxl@vger.kernel.org, Vishal Verma , Dave Jiang , Alison Schofield , Oscar Salvador , Ira Weiny , Jan Kara , Matthew Wilcox , Lorenzo Stoakes , Vlastimil Babka , Michal Hocko , Qi Zheng , muchun.song@linux.dev Subject: Re: [PATCH 1/4] mm: generalize vmemmap remap architecture support Message-ID: References: <20260903122128.12264-1-songmuchun@bytedance.com> <20260903122128.12264-2-songmuchun@bytedance.com> X-Mailing-List: linux-fsdevel@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: <20260903122128.12264-2-songmuchun@bytedance.com> On Thu, Sep 03, 2026 at 08:21:24PM +0800, Muchun Song wrote: > ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP is named after its first user, but > the underlying requirement is not HugeTLB-specific. Generic MM only needs > to know whether an architecture can safely remap populated vmemmap PTEs at > run time. > > Rename the architecture opt-in to ARCH_SUPPORTS_VMEMMAP_REMAP and make > HugeTLB vmemmap optimization depend on that generic capability. This also > prepares for FS-DAX vmemmap optimization, which relies on the same runtime > remap support. > > Signed-off-by: Muchun Song Reviewed-by: Mike Rapoport (Microsoft) > --- > arch/loongarch/Kconfig | 2 +- > arch/riscv/Kconfig | 2 +- > arch/x86/Kconfig | 2 +- > fs/Kconfig | 2 +- > mm/Kconfig | 6 ++++-- > 5 files changed, 8 insertions(+), 6 deletions(-) -- Sincerely yours, Mike.