From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794754443; b=tstRVZzGdwOTOk6S58Z+qd4uABPwfX4GSH9rLP0fYAN7o7Rr+j6KEdA1QHYHxIBLHw67 hEzuGAOxIQIIi22Vh2Mj/hv0kVbDSsaGQLLCVk9RFsT9OmUK9uPdPWKenpzFW9hk+tD/W YeMgEcbY00Xa9T9LqyIFAz1yj/cxO/QgYgyERuajDN/B1WxukUbKUZRhNTVwfW/AQKxeK b3OYqyUnypjNfBOuQMMukN1PvSyP9jUt30mODKRKUIphQTlEaP32wTQXxgO1+oVUx/4is clwi97SK1q1XgvrVlSZY8GKUR82SpYJpWg3z1a0iPf29NEVYG0BzEk15AiYBsfR4aZA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794754443; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-Id: In-Reply-To:References:X-Mailer:Mime-Version:Content-Type: Content-Transfer-Encoding; bh=/+Jso9I5c9riULwHU1kEXAc9fGEjvoAMCDTyw4f1fvY=; b=IHiyb2XZM/m0/Wq/IR7pw7kyMZHxau+uSUq6dbt2IwfVPmrhg3kyBLnHQkXDvjGeYl2C FgroRbBzURSGF7hChAPC6VyntxyJmF+amm86DjqQ/QV9z6bh5f0oSilkc3PoyBfKjPY4a t9/xjGOzdkHygc+G7ZD7Ct/bspivfA9p5z2KLyt5VIMgbyIciNcePRI5Lts2oTPG/B18r OFWVLq+upZ3suT+sQ6tjo3eYzT8/CUarnNNwPtALdU1qNDtyENB7+h86KaGNWlYzDcVXy tR+sL7uOVbaU+R+/OsOehAlsH0YFAxFWwGR2mhjrnxmLRDsz/WA3EbuDtSSFLBaSJ1A== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linux-foundation.org header.i=@linux-foundation.org header.a=rsa-sha256 header.s=korg header.b=wKOzZy9n; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5C40A606A31E; Sun, 15 Nov 2026 14:54:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.a=rsa-sha256 header.s=korg header.b=wKOzZy9n Received: by smtp.kernel.org (Postfix) with ESMTPSA id B87481F000C4; Sun, 15 Nov 2026 14:54:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1794754443; bh=/+Jso9I5c9riULwHU1kEXAc9fGEjvoAMCDTyw4f1fvY=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=wKOzZy9nD3b98doT54vEvxjgW1PGSuPRLutSRd3EfjVq73n7zWs0PH2xxKCt2qIta 9om4DYaNXMEkQS+pjxBSAQnqIHvvd7CCOan2ToZ1+fNUiV6dVVKthVmR906ly6Bb47 3mgknZOikmkFKrWNUBmwK2bYA8TIyMaRALVF+/LY= Date: Sun, 15 Nov 2026 06:54:02 -0800 From: Andrew Morton To: Noah Feldt Cc: Shakeel Butt , Johannes Weiner , David Hildenbrand , Qi Zheng , Kairui Song , Barry Song , Meta kernel team , linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH] mm: mglru: splice all generations when reparenting a memcg Message-Id: <20261115065402.90457052d92ddf668f7e37d5@linux-foundation.org> In-Reply-To: <20261115124954.7146-1-noah@feldt.systems> References: <20261111000913.22943-1-shakeel.butt@linux.dev> <20261115124954.7146-1-noah@feldt.systems> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Sun, 15 Nov 2026 12:50:02 +0000 Noah Feldt wrote: > On Wed, Nov 11, 2026, Shakeel Butt wrote: > > Noah reported list_del corruption on single-node hosts running 7.2.11, > > which already has commit bf4ade7dbd76 ("memcg: keep folio's objcg same > > as its node"). The bad pointer is an MGLRU list head in a freed > > mem_cgroup_per_node: > > I have already rolled this patch out on our servers. Since then the > panics and resulting restarts from my report have stopped, and we have > not noticed any other unusual behaviour. > > Tested-by: Noah Feldt Great, thanks, added to changelog. This patch is in the mm-hotfixes queue for upstreaming during this -rc cycle. It has cc:stable.