From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EC157475335; Thu, 10 Sep 2026 12:37:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789043824; cv=none; b=MBIRm2d9+FLLwOkXRm91/Te2xc4sHuazJSETjxvp/rQOgnHRPCZO3a1NUrm9onbHu/iqse5QZS0TTHG3qbyBkHT6NTzpCfeg3/fh4DQ9+T7H9nziPCuM4wnbpbWa0Hpb4nmiUvMseWRecg4LMfvBTuZuW3VEwzH0uxCWpx9IrQY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789043824; c=relaxed/simple; bh=Ii22KJPnT1Z3jSNebgHtNAPZSs2KVYz707Z+/RnSE8s=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=XYaw52utp0tXZ7065tWZQ7YQ0+pmcZGhD5zapnApeQ4NscHcuM2aYMhlk3wKQRmJxkRxjIlcu7wpffoPTngH13sHgGMZDh/Qc3xK7mh0R/TGlqJs7El2IFj4CVL/od5PE5V6OTHQA4Xzhye7M72mgVmhKElE9q7wwXwUF2DlDBc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JrzN3r6/; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JrzN3r6/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E1A2D1F000FF; Thu, 10 Sep 2026 12:36:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789043818; bh=4nW91mvS/Fi4pVir8EYL5mI4Ee2UIeScYvHoNKHO+nk=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=JrzN3r6/SuGu0wLLlhmnGwp16rjFX3IFKW8tA2Ub2oIen6X9Fy6XbcOCjDitcNsxn iY8/jWDvobcGvrvU2CMKHqnY9JdNeVpWRGmoyUot83pgg6NweZjlXi5SbGmS1yIzvL 2gTK0mGB3Hp7CSBXiZdGRIYjs6AiY/VIYzmN4L32DoUVAuS9yGWuwRyYwS10MprPVi bCgRrUUc6+F0UXYlCIxn4DFNNIIzG/mO8h3TXVAPMVR4SkEYQuchi+MLqmBfTAB8aT tv7Y0SDPJD5uEVc2Uus3Wcj2t05n74G3tkFwg6omJ4WT5HjeoAfkBghnVnBCfvqWPn ISd+jNGAOsEHg== Date: Thu, 10 Sep 2026 13:36:56 +0100 From: Harry Yoo To: Pengpeng Hou Cc: Vlastimil Babka , Andrew Morton , linux-mm@kvack.org, Hao Li , Christoph Lameter , David Rientjes , Roman Gushchin , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonathan Corbet , Shuah Khan , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 1/4] mm/slub: use a track count for user metadata sizing Message-ID: References: <20260813160825.73031-1-pengpeng@iscas.ac.cn> <20260813161059.73855-1-pengpeng@iscas.ac.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260813161059.73855-1-pengpeng@iscas.ac.cn> On Fri, Aug 14, 2026 at 12:10:59AM +0800, Pengpeng Hou wrote: > SLAB_STORE_USER metadata consists of allocation and free tracks, but the > object-layout calculations repeat the literal count at each offset site. > > Add TRACK_NR to the existing track-item enum and use it for metadata > initialization, original-size placement, object-extension offsets, padding > checks and cache sizing. This is a behavior-preserving preparation for > extending the tracked history. > > Assisted-by: Codex:gpt-5 > Signed-off-by: Pengpeng Hou > --- Looks good to me, Reviewed-by: Harry Yoo (Meta) -- Cheers, Harry / Hyeonggon