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=1793786563; b=WnzHjVELMm6dmw2FQo82KA8hPl4XjiWtuAheKN+yASRCeCABmx7x+WZ6jZtRAsZ79itv lVV3WJb+JfX4P+2cXxp4UVoU9SArjdTaaXzE65dBM2M8YP5eM6+ae/MoQ3jp6SCN1O/Tw d1Np+/H9lEvLVdCEVW2pU4HpvpvNsjcOw7w3s7Hj54lfnKJPJciN0TB5WYtpx3aQk5nM+ HHVeZ0QiAg+5zcIwVeQ5NlDVbuRH6GsPXKrlEZ1ohVEKclwj9SFwg+TCCrnNzp7FQuz8e sdLdlQmF4uz1CvzFgY7c6lYQ8Tz8FkopQrYe6n05ZqbpU2og2uvgeDwwQB/y1NM16zg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793786563; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=gsMsIdsVful1BlmTIAizWyUZ84e/BlfvPlGTZJwyYZo=; b=RKN97ohsWf4/22VC1LRaBA1NXpT4mX8aDh8NzoK8UxwbeAUOl5/cokW6pFFesvysVs7S iuOaTSZH2k14ppuhkb7QbAV78hzLQecmq7r8U1sHQpMgFGByxroNxhNSf/ffueK2RFzTd 5zxjxZsx18zyQpNO3CfRGNi+gRNmVv07FHu4HMTnqSm2mWEi75XDdEAN1MRBOuPSNdQdW jYOmFmqGgAN9f8JUBXbZ5UatWsExjedGpXtmQGupwc9kIoYHElRChCQWre5hSCGeLwbqp Zunfys4kiKo9YdTwNATbrV1iSmo0dcQELBSpATwtGZpCpFg8q/zDurbcmSajGBSnMhQ== 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="V/vrYRp0"; 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 B107E606A31B for ; Wed, 4 Nov 2026 10:02:42 +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=V/vrYRp0 Received: by smtp.kernel.org (Postfix) with ESMTPSA id BB5A51F000C1; Wed, 4 Nov 2026 10:02:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793786562; bh=gsMsIdsVful1BlmTIAizWyUZ84e/BlfvPlGTZJwyYZo=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=V/vrYRp0MYR3H+LKzmfFDqD/fLBwB3C5OIC2C/3QFYR4pkt151g8I4L2ubXnpDYzS jqlDUYgty+BebpKbd4uwaqVdMtN9XeNXHlSCxyXz25/V7fXSiLINzTr1SJMFIq/m+2 n4ih3ckd26s9najTUSTzlx/TnyU32tGdT4NYbCCjQQuiXY6t41uv8EhdpjhfhJkajE mnagPWy5P9KhWGo+9MlY5XxlImzi7tzMZZAywGnl2f1y5W0pYnUVHQjcvOi97Fz4xf Ni6oMAQEiM+IW+mxOHWIjJyPkeS4IEFZiD8RWGIpuc53LL9E2NHKt7zOkpH8JNLwUq MyqqO6i2sNlLw== Date: Wed, 4 Nov 2026 11:02:37 +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 05/12] mm: hugetlb_vmemmap: unify writable vmemmap page preparation Message-ID: References: <20261104023510.260766-1-songmuchun@bytedance.com> <20261104023510.260766-6-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: <20261104023510.260766-6-songmuchun@bytedance.com> On Wed, Nov 04, 2026 at 10:35:03AM +0800, Muchun Song wrote: > Installing a writable vmemmap page requires consuming a replacement page, > copying the current contents into it and making the copy visible before > publishing the new mapping. HVO currently splits this sequence between > the page-table walker and its caller depending on the remap path. > > Centralize the sequence in the walker so all writable replacements follow > the same copy-and-publish protocol. This keeps page preparation with the > mapping update and removes path-specific handling from higher-level HVO > code. > > 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