From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-186.mta1.migadu.com (out-186.mta1.migadu.com [95.215.58.186]) (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 290D31C6B4 for ; Sat, 4 Oct 2025 07:53:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.186 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759564428; cv=none; b=B0fISEcQi7rLEnihG/IINGJyYFFlI7vetVwt3JW7HWBGBzM2mUtNwMopTYyerEwnKHMnOU+saTkZ7nkg5SjQlwOWmothPJeeFfj1Mv4k0y8ZKUOLlI8deMmIvVdxpIS2oIA2u8bsmkx63HWO/xdPyQ2voJbokD5mH2EvtPJt3nc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759564428; c=relaxed/simple; bh=QndMu2QKAOjWsIipXFMctRXDCC8DKeroYCWYlBLqawA=; h=Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Cc: Message-Id:References:To; b=jBVWtWw8h2HYvwLQvu9sJMQqHltS4CANZSPvKwdn/C6yQ+KCNw5N1kmCzXqV+zgTtB37VvVUG6vpEozh/wgHYVj7AalGldTr4j6F3mc8QOYTDSMzgErjvgTZNlsxJS80wNfwQ5sIj8ZJKtk9GkMNWWE69ENA7kNbzVI6jSLcqVY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=flW9PA12; arc=none smtp.client-ip=95.215.58.186 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="flW9PA12" Content-Type: text/plain; charset=us-ascii DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1759564414; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=NDTyBoj3HBSA29dmJDmDIgHpDLm4JM2AxR+uo2SbpRk=; b=flW9PA122rsaj8FCZ9sSzQKvuXWZQVLiZauUjpuUCygfNzABUsAVa10ye93ZH0tw57+hpv xWNYfhmqMMGheekpHg879UxdbD7LGSKB38VU2q7a/6BdPLpX/gq3ktgN3m2nAp2UYeT+xW xQ1v2uIWXKVRUn6m+qOxo9l1GokicuE= Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3864.100.1.1.5\)) Subject: Re: [PATCH v4 4/4] mm: thp: reparent the split queue during memcg offline X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Muchun Song In-Reply-To: Date: Sat, 4 Oct 2025 15:52:46 +0800 Cc: hannes@cmpxchg.org, hughd@google.com, mhocko@suse.com, roman.gushchin@linux.dev, shakeel.butt@linux.dev, david@redhat.com, lorenzo.stoakes@oracle.com, ziy@nvidia.com, harry.yoo@oracle.com, baolin.wang@linux.alibaba.com, Liam.Howlett@oracle.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, Qi Zheng Content-Transfer-Encoding: 7bit Message-Id: References: To: Qi Zheng X-Migadu-Flow: FLOW_OUT > On Oct 4, 2025, at 00:53, Qi Zheng wrote: > > From: Qi Zheng > > Similar to list_lru, the split queue is relatively independent and does > not need to be reparented along with objcg and LRU folios (holding > objcg lock and lru lock). So let's apply the similar mechanism as list_lru > to reparent the split queue separately when memcg is offine. > > This is also a preparation for reparenting LRU folios. > > Signed-off-by: Qi Zheng Reviewed-by: Muchun Song Thanks.