From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=95.215.58.115 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792562888; b=4lWbhXOMDGFr2KgRK0Y1ssm48feo4GffK37vSE9hXE0seQhtddketupOqwSgf+SR/thD bwp78ef9MQTi8lOM0zZDHPTmBdAKujEzV1itO3a+YKevZCpGXTrayiOHCVKeMJPBNcc8m CAf+Y8cB0o2ikPaY/r2k811ju9sqShUwN7BaDlBNt6cKfKFJmkz+IlkcIBmUuxGvXZe9e ss7saCZ4Vpv/SfIcNw7Tcnn2eYXxKqJ+nbbmpWn64YWil4ixE8HK6Sz0OsFjbY0cNcvAh V2yT5cPobq9/wJe2/93mlogpPgebz+54ihOPI41FQSg5Y3C/WO/B/5VG3q0tN3x+PmA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792562888; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version:Content-Type: Content-Transfer-Encoding; bh=ZYe3wOkYMWAT9nEkJmHND9GUlXX8tkyrEnTbfn+hGAE=; b=pYkmVaku9OPO2UlVKNox8YUBeVVbJXsBYMkdV1Lw8g4cKqTLlwUcZ82Ae3/26N27WvT+ tduwEn2w3XBk/VFiiYH5v5NbqTI+eGRPmCxFUfjbaMIjSz8votEtT8uWoXXoNEKZJBs0h GYkkBM68U7zQadFkESVDdnd3qZRKkCEf1BrPJCDNYGTXVBd2TcsQA0A734mIRxi7yZw2f aH+od3n6QI4VgJavibq0ew9v79QjFxxJsoFAwpW6RRyExUOeQcfQxuDeydYjPAbmYgA1p /xWdb6PXK6et8WUnSe90IRT25O7HwKWvb0DutCaaMGmE/ATDz86qPCtY7ScGMplhZ3w== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=p02NDSmT; arc=none smtp.remote-ip=95.215.58.115 Received: from mta1.migadu.com (out-115.mta1.migadu.com [95.215.58.115]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8344C60A262B for ; Wed, 21 Oct 2026 06:08:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 8344C60A262B Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=p02NDSmT X-Envelope-To: linux-doc@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=4KIURn7WEb1ayotO22ZrkJ9wcqdsX7N260OoXXlEYTw=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1792562884; v=1; x=1793167684; b=p02NDSmTaSCB8KSHun2b3TBjbf1NxzTB/b6rDos/XyDiLhiG+2lxVTaZ4aTR24rWJ9/gY/mw cOxsxKQ8l4CCJ668HxHAkwzAjhfXpzA02MknKMDcP6EqNdBo6cYSi0IeK3sur8sTHobIbATp94K 8nj/4oIDDrwoxMYcccNwBXQE= X-Envelope-To: linux-doc@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id da1eddc643cb8bda; Wed, 21 Oct 2026 06:08:03 +0000 X-Mizu-Trace-ID: da1eddc643cb8bda X-Migadu-Flow: FLOW_OUT From: Lance Yang To: songmuchun@bytedance.com Cc: akpm@linux-foundation.org, david@kernel.org, osalvador@suse.de, maddy@linux.ibm.com, corbet@lwn.net, muchun.song@linux.dev, lance.yang@linux.dev, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, ritesh.list@gmail.com, sshegde@linux.ibm.com, skhan@linuxfoundation.org, rdunlap@infradead.org, qi.zheng@linux.dev, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 3/4] mm/hugetlb_vmemmap: remove vmemmap_wrprotect_hvo() Date: Wed, 21 Oct 2026 14:07:56 +0800 Message-ID: <20261021060756.4599-1-lance.yang@linux.dev> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20261019090830.1917657-4-songmuchun@bytedance.com> References: <20261019090830.1917657-4-songmuchun@bytedance.com> X-Mailing-List: linux-doc@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=UTF-8 Content-Transfer-Encoding: 8bit On Mon, Oct 19, 2026 at 05:08:29PM +0800, Muchun Song wrote: >Shared vmemmap tail pages are now mapped read-only during initial >population, so already optimized HugeTLB bootmem folios no longer need a >separate write-protection pass. > >Remove vmemmap_wrprotect_hvo() and skip these folios during boot-time >optimization. > >Signed-off-by: Muchun Song >--- Yep, already read-only, so there's no need to write-protect them again. LGTM, so Reviewed-by: Lance Yang