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 0A57443A819; Tue, 28 Jul 2026 17:46:51 +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=1785260813; cv=none; b=cfqFH4RsUa69bPPSUoQPTcg+SZ64xApUUqjc7ibeoIeaKacQzYvPLLfCSyZph3VOxb0MLVsW3zxQyxAk9xJl076BgbBozRpzKQFFsAYBOpAqziNMxGeXmP4ykvu4w5cqInBD3XKWnlcbLmgWRvESbTsZh6tisqPUX2ytxQLnICY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785260813; c=relaxed/simple; bh=sHsbfYU0MFlK7vKyxXyuorEJS/ZKPznQ/g678KXEQUw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=dGxKuHJbb0hILs4sEiZ70ARHu9SmxRoAMf84ziRUbJJmZ4Qa2//bNwucEtxI56Gs3RTGwKi+6ZCP8TJqa3qtN4LRMXZKlRjUPhtpOFchMPvHau3md21aplVi2E/mt8fjXGolNy7kt1lizMoZgliMlUf7PY8xkQCqeIyKvj3hdF0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IN1C/6TA; 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="IN1C/6TA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 37DE41F000E9; Tue, 28 Jul 2026 17:46:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785260811; bh=oGzCyBQVNAADahTS9j+taObDqgyrjdBmVF7/If3BszA=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=IN1C/6TABX8DJkmlH/pqQ3Gh9ymlJQAXHBqgl37UZuJxbsCwEPm0kfmtHidqBmwEl jWh7R+7qKBg/lB0fJrNNBM6NJIjRIdhVVlRUiIQGwWp6v+WR7PtBLQItV1bt+bW9z/ dclDTxcN0nwp0N6cZuSALlo7luayIE3YE6m3x/ki2+lbsqSuoDBO356VcmVh67fnkR kkRbMdsnba+Vl7LPK5jOFZq+6iFRSHQR28znFUBw/PBuZJm1tEQWUNNvi/OulePmB0 F8cWOEfewGKnP3E4anDlgWZQmbfa7Acp3+3cvp3JvQgiyHjev7Dy9XQ23UhEV2CkU/ 9eX7q8Ad/mkng== Message-ID: <53f59eaa-efd8-491c-ae12-510e2b675533@kernel.org> Date: Tue, 28 Jul 2026 19:46:47 +0200 Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 00/13] mm/slab, alloc_tag: reduce obj_ext memory waste Content-Language: en-US To: Harry Yoo , Suren Baghdasaryan Cc: Hao Li , Shakeel Butt , Alexander Potapenko , Marco Elver , Andrew Morton , Christoph Lameter , David Rientjes , Roman Gushchin , linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org References: <20260727-b4-objext_split-v3-0-c29ef0f1f257@kernel.org> From: "Vlastimil Babka (SUSE)" Autocrypt: addr=vbabka@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 7/27/26 14:53, Vlastimil Babka (SUSE) wrote: > --- > Vlastimil Babka (SUSE) (13): > mm/slab: skip kfence objects in allocation profiling > mm/slab: remove objs_per_slab() > mm: move struct slabobj_ext to mm/slab.h > mm/slab: make slab_obj_ext() determine object index > mm/slab: abstract slabobj_ext.objcg access > mm/slab: abstract slabobj_ext.ref access > mm/slab: replace slab.stride with obj_exts_in_object > mm/slab: change struct slabobj_ext to a union > mm/slab: introduce slab_obj_ext_has_codetag() > mm/slab: reduce slabobj_ext memory with allocation profiling disabled > mm/slab: add cache_ and slab_needs_objcg() helpers > mm/slab: stop allocating objcg pointers when unnecessary > mm/slab, kfence, memcg: completely remove obj_ext for kfence objects > > Documentation/mm/allocation-profiling.rst | 7 ++ > include/linux/memcontrol.h | 13 -- > include/linux/slab.h | 3 + > mm/kfence/core.c | 12 -- > mm/kfence/kfence.h | 3 - > mm/kfence/kfence_test.c | 2 +- > mm/memcontrol.c | 40 ++++--- > mm/slab.h | 189 ++++++++++++++++++++++++------ > mm/slab_common.c | 26 +++- > mm/slub.c | 184 ++++++++++++++++++----------- > 10 files changed, 325 insertions(+), 154 deletions(-) > --- > base-commit: 5ff172f6c94d282d83cb88bdfec5f647ad9c6105 > change-id: 20260714-b4-objext_split-da82426257d5 Applied (with fixed up 10/13 per sashiko, and 09/13 with a debug check per Harry). To slab.git slab/for-7.3/objext_split and merged to slab/for-next.