From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 DC879606A31A for ; Wed, 21 Oct 2026 06:08:31 +0000 (UTC) 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 Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4j8f3f20G6z2xM9; Wed, 21 Oct 2026 17:08:30 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2001:41d0:1004:224b::f8" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1792562910; cv=none; b=NltqLZrf0GpuaYOni2bfBLsHqwRsw3sT+YiwKmziYNECHOuo6Rr6/EtvdBlFhiEmFhu30lj3fVKBc8sx+npFzxcIMvb4lbPoBIYrdMn8+Yuwj9bAYl07xUb42Fs2/XwLXreHOAke4lKy3xkgVy8xa1FBu7qU6wPquOdIHs1mZMwQfKrjRpqPwTN3LXeLGVBkoFtmJK1Q1i/xwtYx7COuyF493pQE9b/PXuHCu7qe83/i6jUBUzwqz5Kjmgl4vsn6ratUl9ozyFGLDIx7jN/aBM+iT1+8cNsbKyGlpMK94KIgvw98q2HQbYRtPqXD3VaR6keC7T80N8f9AUCLw+9HNA== ARC-Message-Signature: i=1; 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dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: lists.ozlabs.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; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.dev (client-ip=2001:41d0:1004:224b::f8; helo=mta0.migadu.com; envelope-from=lance.yang@linux.dev; receiver=lists.ozlabs.org) Received: from mta0.migadu.com (out-248.mta0.migadu.com [IPv6:2001:41d0:1004:224b::f8]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4j8f3b22Bdz2xM7 for ; Wed, 21 Oct 2026 17:08:24 +1100 (AEDT) X-Envelope-To: linuxppc-dev@lists.ozlabs.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: linuxppc-dev@lists.ozlabs.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: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , Precedence: list X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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