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 0F8923AC0FB; Mon, 15 Jun 2026 08:52:54 +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=1781513576; cv=none; b=g6yIitJCNGTWn0w9+71lXpTfkRWd6RrrJ1ikEoLGmofJQPWn61DQHo03ISzNPqqDCKtJKw0VHtmHG+ZOMUyOHMI9wcwYL1/DNeb6HhQjjzZr+GwQHjQYokzKgLXf9gveFUDHQyjo1Q/cp+MwUqEDwVntSE9vOWf1YNaV9P4KUsA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781513576; c=relaxed/simple; bh=O+KV/Mks1/NllMkaRsK+dF8AqH4ei9BiYn9MpdooP1g=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fCylf4c7n55lbeLQAILznMCmqne43bBvzxzex2t1BuRzITNkryVZoUtqLKvaIYP01eBe3QK92JdrI5SS4jCquRNusaPuRvS43T5ihVZLrntF8FjI2uussPIAyxPFDtuGslHdPdCwNHuslEhWFxm6SBHpJKsdWm3fjlrnyjRCElg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ewQFWwyg; 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="ewQFWwyg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 47ED61F000E9; Mon, 15 Jun 2026 08:52:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781513574; bh=r0nmh4n8OK2kmhJCZ0gvPcKvVFFqmHfVbiE1li979bk=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=ewQFWwygD+69bmRiisV0lUdrbdqTMDJF5t9OWjDl1tRpbBeUrUmkHa60LypyOvYF2 hzvirLnXweCCqO5jHf2welYVGNntxwNNJRuJ+GrufjNY06LsXQ9+DKRgbPPXq+y0zL WUKiqTtCEVwZafLR4jmWA4TNcQCMqIyhsWLTopNEZOb7pzpIh0Lxcgdf8whvcu6GLA qy+Gid7McKKg4ztXJgO7sw6l5wahjcCiRbFloEhHDglDhPUdHOL4jimfmDEuC+KEIt A9lhM7FHSG7CexjXtIppyPaMw7IWGVhSAh3xV2SIDyqIRO2WVlIe3U0qM3rTislIBE eOwjFpmKgzPfQ== Message-ID: Date: Mon, 15 Jun 2026 10:52:50 +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 v2 02/16] mm/slab: do not init any kfence objects on allocation Content-Language: en-US To: Suren Baghdasaryan Cc: Harry Yoo , Hao Li , Christoph Lameter , David Rientjes , Roman Gushchin , Alexei Starovoitov , Andrew Morton , Johannes Weiner , Michal Hocko , Shakeel Butt , Alexander Potapenko , Andrey Konovalov , Marco Elver , Dmitry Vyukov , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org References: <20260610-slab_alloc_flags-v2-0-7190909db118@kernel.org> <20260610-slab_alloc_flags-v2-2-7190909db118@kernel.org> <159d1e20-5b21-4329-ac9a-f7a5cb0fd56a@kernel.org> <74adf668-78c2-4989-a6c6-c6ec7bd68855@kernel.org> <4cf98483-ae35-4ad0-8f77-5a46194eb65f@kernel.org> From: "Vlastimil Babka (SUSE)" Autocrypt: addr=vbabka@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 6/15/26 03:28, Suren Baghdasaryan wrote: > On Thu, Jun 11, 2026 at 9:37 AM Vlastimil Babka (SUSE) > wrote: >> >> On 6/11/26 17:11, Harry Yoo wrote: >> > >> >> From 3a1c4398ce9f361a4e6f4d9946eab6237eea89c2 Mon Sep 17 00:00:00 2001 >> >> From: "Vlastimil Babka (SUSE)" >> >> Date: Wed, 10 Jun 2026 17:40:04 +0200 >> >> Subject: [PATCH] mm/slab: do not init any kfence objects on allocation >> >> >> >> When init (zeroing) on allocation is requested, for kmalloc() we >> >> generally have to zero the full object size even if a smaller size is >> >> requested, in order to provide krealloc()'s __GFP_ZERO guarantees. >> >> >> >> When we end up allocating a kfence object, kfence perfoms the zeroing on >> > >> > nit: perfoms -> performs >> >> Fixed. >> >> >> its own because has its own redzone beyond the requested size. Thus > > nit: s/because has/because it has Fixed. > Reviewed-by: Suren Baghdasaryan Thanks!