From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) (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 5F37024E4C3 for ; Wed, 25 Mar 2026 13:38:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=18.9.28.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774445902; cv=none; b=XZhWORK9X/fzQATh+dNOdFZPnW39tKdZe06bHj6L6uGkh0tL7uapeG1zdA9lIvbM849+o80u5RSXMP7Po/hutwDUVAoCeoTOmLDrAyBkWxnM08FCQXgDpQuvkdRPhMf53+Lo9pc3qq15uW8sMeqLy7ULAd1hRGdEveWw3B+zT0k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774445902; c=relaxed/simple; bh=KYgT70MUsHwQlM/4cfi+uo2BeRI5d1V+MMketwI+s3U=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=B8D+VG4v45GgL+S80x90xzf82evuLRPjIm1+Hr6de4tOt9xUyDyi8/9RUT+zSPbwuRToNpW25LK665o9oHhe84RgQ4GJHUl+HVmZc8JNzf18H2ot+yYvtEtnTdS99Qk8up7CfPQo6GFcrw0quQjr+bdLD2JG/yJLOBQ0VYX9vuE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mit.edu; spf=pass smtp.mailfrom=mit.edu; dkim=pass (2048-bit key) header.d=mit.edu header.i=@mit.edu header.b=YGfGRCy3; arc=none smtp.client-ip=18.9.28.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mit.edu Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mit.edu Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mit.edu header.i=@mit.edu header.b="YGfGRCy3" Received: from macsyma.thunk.org (172-245-102-52-host.colocrossing.com [172.245.102.52] (may be forged)) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 62PDYu0X006721 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 25 Mar 2026 09:35:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mit.edu; s=outgoing; t=1774445705; bh=VYpbkawdJVNuKw367M8SoRscvuu7Nv1RyWd0oyP5C9M=; h=Date:From:Subject:Message-ID:MIME-Version:Content-Type; b=YGfGRCy34QJLRAAs9K2a7CKYcOz08lIuU5fO+xU5yJauWEfiVzL8J7BAQJBBnX6xH fQ+06/jhI/HUcbmTmmW3Sea1N9HVyBo0/3MzT8lmbWapPMcgG1MU8oFFeGu6xkxqH1 6mhag6C29mQJ4O/Wdxls0tgB2tDI996Y20E4MF5IHNMVCGsQLKihtb2l0J4tGqUGLH duA0Yhc/NbSAd9PzfZ0jtY6+ZQ+oYDhtJPMg6cKYcqGsI3dVt2AlP3IHlHzEyXpeST ebUJJIEHbxEttM8XMzZI8SIHANCIdA5qDEcvxbbfbkxGyURshmPjeYzfOE+pcz/tz2 9JZ+Q9yD7j0oA== Received: by macsyma.thunk.org (Postfix, from userid 15806) id 6217F5F3E9DC; Wed, 25 Mar 2026 08:34:56 -0500 (CDT) Date: Wed, 25 Mar 2026 08:34:56 -0500 From: "Theodore Tso" To: Sun Yongjian Cc: Francesco Dolcini , Greg Kroah-Hartman , stable@vger.kernel.org, patches@lists.linux.dev, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, linux@roeck-us.net, shuah@kernel.org, patches@kernelci.org, lkft-triage@lists.linaro.org, pavel@nabladev.com, jonathanh@nvidia.com, f.fainelli@gmail.com, sudipm.mukherjee@gmail.com, rwarsow@gmx.de, conor@kernel.org, hargar@microsoft.com, broonie@kernel.org, achill@achill.org, sr@sladewatkins.com, Jan Kara , Brian Foster , Matthew Wilcox , Gou Hao , Kemeng Shi , Zhang Yi Subject: Re: [PATCH 6.1 000/481] 6.1.167-rc1 review Message-ID: <20260325133456.GD2107@macsyma.local> References: <20260323134525.256603107@linuxfoundation.org> <20260324073447.GA5062@francesco-nb> 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-Disposition: inline In-Reply-To: On Wed, Mar 25, 2026 at 05:03:37PM +0800, Sun Yongjian wrote: > Actually, this concurrency issue stems from mainline patch 060913999d7a > (part of tags/v6.11-rc1), which reordered the migrate mapping and folio copy > operations. Since 6.1 lacks this patch, the race window doesn't exist there. > My apologies for the missing Fixes tag. I'm confused. That commit 060913999d7a should be backported to 6.1.yy? Since 6.1 lacks this patch, I dont understand your statement "the race condition doesn't exist there". Or were you trying to say that the _fix_ for race condition is missing in 6.1? Or is there some other commit which fixes 060913999d7a that needs to be backported to 6.1? Thanks, - Ted