From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 F2C4C34107F for ; Wed, 11 Mar 2026 21:19:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773263970; cv=none; b=nmZl6aBAd9D/35tX0fe66d8HrRTfqEFaKhBNoqfCJTARtSiu2Dp0+pGUoeca4dQXP2zGuxy2lguLBQPBXH8l8VmNk12+8YE+kZaTA//A6mgFpnihJeu8Egso8Ryuu7rx/WjKz3of/mIZYumJ+/djrIzJHS+R+8UtNJhziU2h0mc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773263970; c=relaxed/simple; bh=IAmbtID+620820LXcQy4ka2soJ4U+nuKAqtku7J0NO4=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=nVdpFV/J038sav39qRayoh7cnVniHLsfEUyxN4vOeOIVScM0/cHDXcVJh4sEQm5nhJd4CuO3lO22XT3J5OfPQY5ePTpOEXrwK0C5BvD5XrzFlqApDu2B84hB6x+oyIOnu/adLGk3215iXO0nKy9cqk2rbVZ0bVjyY00PBnujKnI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=IGPtexWy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="IGPtexWy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DAB64C19425; Wed, 11 Mar 2026 21:19:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1773263969; bh=IAmbtID+620820LXcQy4ka2soJ4U+nuKAqtku7J0NO4=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=IGPtexWyH1Y2qVEVSjpKmNAYYvioVGoDGq6ak5/IOBSmODrhYEMDcacHe7pJu3NWa Jqq9s4165S09SOXGFeLOpIap21R/bTsTvkmt4nx6yhZC74l/PCNJn9ZPjP9dD5oXAj FMnWYMuLT1gKAmpsm0LHQbm8h+h0Vljn1NMw0EWk= Date: Wed, 11 Mar 2026 14:19:28 -0700 From: Andrew Morton To: Haifeng Xu Cc: david@fromorbit.com, roman.gushchin@linux.dev, hannes@cmpxchg.org, mhocko@kernel.org, shakeel.butt@linux.dev, zhengqi.arch@bytedance.com, muchun.song@linux.dev, usama.arif@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH V3 3/4] mm: shrinker: optimize the allocation of shrinker_info when setting cgroup_memory_nokmem Message-Id: <20260311141928.b4291eae43f99a2f6912cd2d@linux-foundation.org> In-Reply-To: <20260311030235.240953-4-haifeng.xu@shopee.com> References: <20260311030235.240953-1-haifeng.xu@shopee.com> <20260311030235.240953-4-haifeng.xu@shopee.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) 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-Transfer-Encoding: 7bit On Wed, 11 Mar 2026 11:02:34 +0800 Haifeng Xu wrote: > When kmem is disabled, memcg slab shrink only call non-slab shrinkers, > so just allocates shrinker info for non-slab shrinkers to non-root memcgs. What happens if memcg kmem is enabled later on?