From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.168 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792562887; b=3TpX22paCRT4bfJLsxIUX+M0RDZ8eicKRjEwvCVcji0IB0feuvnOb5+2yDT3u1O5nPQd x2A9w4wqBUiQOAhDPRZOda4IPY55xpylWcysdcf936m9izXjXqggIPRHw8Ko93UtRLPb9 zpA871edpiQzJNNpr/plPbfnOZ6cD+3w0Z/WLlWIAJAmNELTJnXr3eRfVG6SYUDWaZmvi FL3JuX8Yz0zL8U/IYaqZxU3aLw4euzz0zMYV1VDEIB0m+SEOiI2ScTitBcKUQx+QNA0ZI TAAGMPuawz2rjmC+SySZ2FIJ8OgA1ZzQXZEB8Ig8m3KDipg4BCAv8of8rs+1INnphog== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792562887; 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=3TuHLAjAkIauVMbH9k6Pi5tH0EOK310K+cyE4bidkwT1AUgrcW2iZu07oVW7S8fJ1D41 RKkhDZ590V6gzeAvcVsmPmXY6r0N6s+Sog3dpT0wXaKOtxNNfejTV1SiCXTmHlx0Z/Sqx lHmw4OgrlK+Df/BJ3Dab69klvnoLrAenl2mI83hZQY1ATO5PT9KgN/y2rNQH0iYKj1uPS 1rloqtuaUbTKAwDGrljW5ifMADNSeQ/KxF9zeHVJU99hSieBHZpsU46kdusL7R8YGa5QC /IznnEBNIUUVSpYVDpFy6ts26mqz/FPJpdzkLyHPJWpo/iVyE+ZQyUeCbnt/QCMP1uQ== 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=91.218.175.168 Received: from mta0.migadu.com (out-168.mta0.migadu.com [91.218.175.168]) (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 87BC560A262D for ; Wed, 21 Oct 2026 06:08:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 87BC560A262D 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-kernel@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-kernel@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-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=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