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 799803C1F; Wed, 17 Jun 2026 11:16:32 +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=1781694993; cv=none; b=hbRhRUW1rZ7VASrLXJ+6jEKwLfxpAVNzXBeuz2ZBLMqpf+ruHatcHpP6tA88DU32RGqF/tB4e4/6BsUpG1GxD8RAGpeAVbKp9STP12Zbv7Tawf0s5MtQnZnsq+d8rmgz4lM5mFfXa/QZULLD0WJzagiqt7mZWX4ap6vMaSyXAuQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781694993; c=relaxed/simple; bh=2rnPd2MSt1vwOoN5rRd8/PQGwWGmqtToaNtSJ9AESsw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=an7++ub9SEPyGmzFKl7FHaXuQeVakMjk9iciA1VFxzNcgA1PbfXnLiRZKpdQmynxyusSTDEh3qTGhrpiaAwnG2QPtPrssJgW0+BSws6DqJozCCDP6zkO/Mr31DRsyRNihWPr8OFzkQm8u0c+hzcnZOdTQb4UWLAXvN3kNzyTChM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gOoZArdh; 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="gOoZArdh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9AF641F000E9; Wed, 17 Jun 2026 11:16:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781694992; bh=2rnPd2MSt1vwOoN5rRd8/PQGwWGmqtToaNtSJ9AESsw=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=gOoZArdhBL5WquhQUqQhY90uMk+cX0ytq2vILPFsG04Kcu7pbgM+rJlgZGYKmAV+Z EeDMupv5/vAOrRL6BHCjH/aZiBD4lwt8Fywe4QNYbU38ljKy/62HpEdz4L2uhDw+He oPedq2y1GqHboyOLFSU8/J+FznBem5XaepHdcIF0u1uk1dG4cOAokcIeY9pfcOyqee J6PtH9dOvJPxNZT61rXHn9IPaXYdsEtZpighL7/LkZyd5pukIsJZSBTN39pVwOy2zB yT3f9aw3wxyKNmPccs60UW1AminTZTAhbuH3yiD6FsSDgfZfI+PHFzyyPx1TTRZNkO FkAzeejkhaf+Q== Message-ID: <22d6cf47-b8cd-4495-8b33-2e9d645fac3d@kernel.org> Date: Wed, 17 Jun 2026 20:16:23 +0900 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 13/15] mm/slab: introduce kmalloc_flags() To: "Vlastimil Babka (SUSE)" Cc: Hao Li , Christoph Lameter , David Rientjes , Roman Gushchin , Suren Baghdasaryan , Alexei Starovoitov , Andrew Morton , Johannes Weiner , Michal Hocko , Shakeel Butt , Alexander Potapenko , Marco Elver , Dmitry Vyukov , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org References: <20260615-slab_alloc_flags-v3-0-ce1146d140fb@kernel.org> <20260615-slab_alloc_flags-v3-13-ce1146d140fb@kernel.org> Content-Language: en-US From: Harry Yoo In-Reply-To: <20260615-slab_alloc_flags-v3-13-ce1146d140fb@kernel.org> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------h0Nqf9c0wfHouf0LoBxkrjqk" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------h0Nqf9c0wfHouf0LoBxkrjqk Content-Type: multipart/mixed; boundary="------------2QCMyJtDnYVZ8sn4T36zDC4w"; protected-headers="v1" From: Harry Yoo To: "Vlastimil Babka (SUSE)" Cc: Hao Li , Christoph Lameter , David Rientjes , Roman Gushchin , Suren Baghdasaryan , Alexei Starovoitov , Andrew Morton , Johannes Weiner , Michal Hocko , Shakeel Butt , Alexander Potapenko , Marco Elver , Dmitry Vyukov , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Message-ID: <22d6cf47-b8cd-4495-8b33-2e9d645fac3d@kernel.org> Subject: Re: [PATCH v3 13/15] mm/slab: introduce kmalloc_flags() References: <20260615-slab_alloc_flags-v3-0-ce1146d140fb@kernel.org> <20260615-slab_alloc_flags-v3-13-ce1146d140fb@kernel.org> In-Reply-To: <20260615-slab_alloc_flags-v3-13-ce1146d140fb@kernel.org> --------------2QCMyJtDnYVZ8sn4T36zDC4w Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 6/15/26 8:54 PM, Vlastimil Babka (SUSE) wrote: > With alloc_flags usage in slab, we can replace __GFP_NO_OBJ_EXT with an= > alloc flag that prevents kmalloc recursion. For that we need a version > of kmalloc() that takes alloc_flags and use it in places that perform > these potentially recursive kmalloc allocations (of sheaves or obj_ext > arrays). >=20 > Add this function, named kmalloc_flags(). Right now it's only useful fo= r > these nested allocations, so it doesn't need to optimize build-time > constant sizes like kmalloc() or kmalloc_buckets. >=20 > Since we need it to support both normal and non-spinning > kmalloc_nolock() context through the SLAB_ALLOC_NOLOCK flag, split out > most of the special _kmalloc_nolock_noprof() implementation to > __kmalloc_nolock_noprof() that takes a slab_alloc_context, and make > _kmalloc_nolock_noprof() a simple tail calling wrapper with the proper > context. >=20 > kmalloc_flags() can thus determine whether to call > __kmalloc_nolock_noprof() or __do_kmalloc_node(), based on the > given alloc_flags. >=20 > Link: https://patch.msgid.link/20260610-slab_alloc_flags-v2-14-7190909d= b118@kernel.org > Reviewed-by: Hao Li > Reviewed-by: Suren Baghdasaryan > Signed-off-by: Vlastimil Babka (SUSE) > --- Looks good to me, Reviewed-by: Harry Yoo (Oracle) --=20 Cheers, Harry / Hyeonggon --------------2QCMyJtDnYVZ8sn4T36zDC4w-- --------------h0Nqf9c0wfHouf0LoBxkrjqk Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc" -----BEGIN PGP SIGNATURE----- iHUEARYKAB0WIQQQ1ub6gR5ogjaKRmOGXBN6rc5S1gUCajKCBwAKCRCGXBN6rc5S 1iFIAP0XkxFaf0DXeb833MFb+xoznKV7cfz9DIc3UD2ItuB5IwD9Gh1fUPp8WVuw KG12x0NvvlNEQNDeaqbaj9R9mbmYCgg= =04dK -----END PGP SIGNATURE----- --------------h0Nqf9c0wfHouf0LoBxkrjqk--