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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 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 X-Rspamd-Queue-Id: B9A30180008 X-Stat-Signature: se4wxrzjg38u6a3skisrhkrh43p79eow X-Rspamd-Server: rspam03 X-Rspam-User: X-HE-Tag: 1781513575-52223 X-HE-Meta: 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 Rsu9sPQt ncstSU7XqKYmy7GN3lPTEhaJy0+ECuKgAmd4DFPsfNxuCxGjiI2yf5gwaTXvOGjgJCZhGcNTbUrSKLSTRUtXImz5H/FTZoThr8nQLbcbzu7JcaemI5TczQ/rDNgGSYBrNM3qcXE/TeFCZJhODgv21p15xJbitWT0VFwnM2OZAqRfqd8VptC4nqggqPv7OwSh6GSyI55gckBipbCEP+NGKG9LJl/s1yN6OerMTMf4OVQ4qiclU5NfdIMDXkHfQKl8eJ4b5qj84s8GaoNo6XJU6kBXZ5sV/+u4QSXEghQYllxz1PLKGpY/E/O8czJVwoMzGQILucKDLpf1fl4IOMNJv8t65zklqSrlByAZzjlpvaQiqCjA= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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!