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 910A537F0F6; Wed, 21 Jan 2026 16:35:28 +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=1769013328; cv=none; b=EO6WwEx+3rh+V9kKCj/yFhenk7FBH+u9AD2OYRdcbc1rP7JTWQCDR1RRcMOJ+H2ZtPB5Se1FdQjcNAEsGTuDuB+0ysjXa6cPzWk1U/N3jQWod49mMpMyACkpmCdxRq81jor3KaThYTucnnBx/oViaDltAkYg7BIWUC+IvijmRlQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769013328; c=relaxed/simple; bh=3zPMWVBv7t5iAJv3hnpBDclZ49++f9lUq423MascAHA=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=TlGSd0eE8L0EUt1j3VO0NS4jelxtKVtwh/Ll37Cy+NClwkhm5+PIjPq9k0lTCe6CBg+yD5uensw9+R8uuHcvt7q10impoPLJE85mEovK+DgD605H3yS7DHHKKbKivB4gL67ByOZuKDckcWeuqlsdnjK8wIkalRFCPqomykDIv58= 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=2bDfcyhm; 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="2bDfcyhm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A3285C4CEF1; Wed, 21 Jan 2026 16:35:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1769013328; bh=3zPMWVBv7t5iAJv3hnpBDclZ49++f9lUq423MascAHA=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=2bDfcyhmX+KhXJ8DHt4vIF2snsRM458gDGeLB6zECJsuEbYlq1q1gowyffUhb5bUe FEJDbI+5di4SdAiAnrexsRvuaySiN0wo78jIo2+/NlrO/kvjke4vk8BN2RbBe0Ycqi Fl/q/E8L/79I9V94mbmL2UH/DL6T+LJYoeT0sXlo= Date: Wed, 21 Jan 2026 08:35:26 -0800 From: Andrew Morton To: Johannes Weiner Cc: Deepanshu Kartikey , syzbot , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, syzkaller-bugs@googlegroups.com, Muchun Song , Minchan Kim , Kairui Song Subject: Re: [syzbot] [cgroups?] [mm?] WARNING in memcg1_swapout Message-Id: <20260121083526.81996ffd70ff4efc8484fd4d@linux-foundation.org> In-Reply-To: References: <696b56b1.050a0220.3390f1.0007.GAE@google.com> <20260117165722.6dc25d72fd58254cb89e711b@linux-foundation.org> <20260118125311.e1894f598e2a8ef626f47f25@linux-foundation.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: cgroups@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, 21 Jan 2026 09:58:42 -0500 Johannes Weiner wrote: > > > I tested with the latest linux-next in sysbot. It is working fine > > > > Great, thanks. But we still don't have review for this one. > > IOW, this is not necessary anymore. Kairui's (cc'd) fix which you > picked up fixed the syzbot reported problem. > > > For some reason I don't have cc:stable on this - could people > > make a recommendation? > > So this: > > > From: Deepanshu Kartikey > > Subject: mm/swap_cgroup: fix kernel BUG in swap_cgroup_record > > can be dropped. > OK, thanks, I'll drop Deepanshu's "mm/swap_cgroup: fix kernel BUG in swap_cgroup_record". I understand that Kairui's mm-swap-use-swap-cache-as-the-swap-in-synchronize-layer-fix (https://lkml.kernel.org/r/CAMgjq7CGUnzOVG7uSaYjzw9wD7w2dSKOHprJfaEp4CcGLgE3iw@mail.gmail.com) has addressed this mm-unstable issue. However Deepanshu's "mm/swap_cgroup: fix kernel BUG in swap_cgroup_record" has Fixes: 1a4e58cce84e ("mm: introduce MADV_PAGEOUT") Which I assume was mistaken?