From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.web.de (mout.web.de [212.227.15.3]) (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 81F127FBA8; Mon, 10 Jun 2024 12:30:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.15.3 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718022607; cv=none; b=q0E9z5DX8sK3oE62OPzUpK2e0VPCFekXmAm+cx0oBdgWGgmGBc+6D2Yd6jpB1nswAGGBnOmkRzyhlMcmIRZv9iPmKj37BrY4urS0pYM0Z3/8jnZqbkwqJP+RqdgjkWi6woTM270Ub5fH0ddsCzMr8LYm4JwazJxZM1GqvbvnOGs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718022607; c=relaxed/simple; bh=wuJQnRYB08ec6imUGRWGaKR53UgTGv9ukbD4T7WaEcg=; h=Message-ID:Date:MIME-Version:To:Cc:References:Subject:From: In-Reply-To:Content-Type; b=f25W11wYbTzselwFyPXoHIzMfJG7zb+cTf1KF+XZ3Uj7XyMevq3DrXhL1DaTaYe17jdVDhmHjqmoPWFTN39a7s5ZAJd5Z/dVKxzMxkf/EyDO+6fHYkOYa3s7V9nkT01ef90RU21uflQFPWWsI0pwzgbhRxUfOoyOrPyRnNaOQF8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=web.de; spf=pass smtp.mailfrom=web.de; dkim=pass (2048-bit key) header.d=web.de header.i=markus.elfring@web.de header.b=Rkh5jNcX; arc=none smtp.client-ip=212.227.15.3 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=web.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=web.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=web.de header.i=markus.elfring@web.de header.b="Rkh5jNcX" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=web.de; s=s29768273; t=1718022496; x=1718627296; i=markus.elfring@web.de; bh=D4Pv1t+P1y3mZ1KhtEA6vVUjt5e+QyYarpSPtOTxoLA=; h=X-UI-Sender-Class:Message-ID:Date:MIME-Version:To:Cc:References: Subject:From:In-Reply-To:Content-Type:Content-Transfer-Encoding: cc:content-transfer-encoding:content-type:date:from:message-id: mime-version:reply-to:subject:to; b=Rkh5jNcXIXoQTjWnF6EkIqPHSsd48v0//cmfBxu1+bDZPMtAUHbqywfNA5GmV37e Vo/YkHNlNCXLLhSwga933B8KPm3H5stqJb8jxs+XcGvgyh40zAcwD4lVsgLEYc0HY /SRvp4mbUqX8lKWX7yExtG5Pt4oRZwN5zQSppOBcAC1CZF0baXXR2YCmAULoJ7naW aovi2mfS8PE8MDER3bMTnldBjUmTNYWH6kJHgZ2WWcjm1MW4p59n7s6LLJBDaxSTi odIf7xa77dFD/AM3vIVIuWlGbloqbbO63/AMZiHhL0VqSWcnLMfOeVhx3PQBd8TWY fl7l94Qn3UO3NMmmGw== X-UI-Sender-Class: 814a7b36-bfc1-4dae-8640-3722d8ec6cd6 Received: from [192.168.178.21] ([94.31.83.95]) by smtp.web.de (mrweb006 [213.165.67.108]) with ESMTPSA (Nemesis) id 1MTvvy-1rpb3S1aOA-00K8Ks; Mon, 10 Jun 2024 14:28:16 +0200 Message-ID: Date: Mon, 10 Jun 2024 14:28:07 +0200 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Chen Ridong , bpf@vger.kernel.org, cgroups@vger.kernel.org, Andrii Nakryiko , Alexei Starovoitov , Daniel Borkmann , Eduard Zingerman , Hao Luo , Jiri Olsa , Johannes Weiner , John Fastabend , KP Singh , Martin KaFai Lau , Roman Gushchin , Song Liu , Stanislav Fomichev , Tejun Heo , Yonghong Song , Zefan Li Cc: LKML References: <20240607110313.2230669-1-chenridong@huawei.com> Subject: Re: [PATCH -next] cgroup: Fix AA deadlock caused by cgroup_bpf_release Content-Language: en-GB From: Markus Elfring In-Reply-To: <20240607110313.2230669-1-chenridong@huawei.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:fmuK/VTR2YmSFLF2VDqjJtmVhTUzsI5l3pGMntg9UQYcsMbycmj +DSIdivBBL62ghxa3h9pU+c/GSmkts8QTF+2OvzfenG91FB8OSkKyy8xMktKwS/8zT6LFpw RT9znp2Zi6CxM09H1KMHHXuz4xWj/7+3Izuh/nT5g4JttQvRfWmi4QWB5Zk3agPzs02+7nq sYjc7gKvFhlTLyknF2hXA== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:jIa/TUJcvPQ=;og0TU1hehFZUopo0uOcnVoVQ2SE 3Hl8UUIUEF7aUsdg3iEOM8wuAg2C1lC/RcyRXdWbBdyXtT3M1oCs3W9fmEbRSvxclKMi1Xfsq K/pC07ZkhlfxkD7DGLn2PWUQW9XFt4DZ3vjZ34cufPmcworgk3twYQqkdw796tGHTqFoCWPT7 dt3cy1XjqqYn8zypQQMnZvFLneZcZtFro+FUvw18rx5aFQi8oYiw4rbL70TKl3QfDaXsuKdYm z5kCE5EYV1lEqZR95mM3L4/39CGhRibzIagsnjmUmMswjkZI0MotoGE8lZpCezDB7mWAkKdRk g31NBO3YWVqWqSZ8cwC4qBT+DXOE9pUyw1V9WPUsbyrG9BQbgS3vRoItT26pXnQ2c9L5FGuuX sskWhPN4z8R0yM3XlNh5hiXBCVIa6peRtb2Ek/pb+dBI0ve+ma3JSdmUOwVorHNWEhY89obdu xPENgzF/tS6VPKyywwtZ4kYaNgP0XTYLQXiTmTqfDXFeUQ4Bb4DGBBtupWnPW7Sxvtu3Rn5yR IX9aVlBRSnI1P4CkBN9rL8pJw0V6IFccQLoxEhICfyNyiAY6BIN1KxI7uXEmxdpVeUYIfz+9B Mcr7aDy2AuyTBoR4X8x+yEypYMwJTY9ZCNrWfFiPWlDw+RZb6G7RR/h3NGjJp4As+069E9zxe MOkZPNdF/laInksUqqbw+m8zOOUuMsPHTCoTydJev9J4igwBB0aEB7srpAl822MPYlntY3+0d wkZ0D/w0DvCpjQBGO9ajL3dTczP9fSMOYpylFNLwXj1XVwsW7kPgxKTPy+0DtPRjZrG9oIwtk Lus04zZxyMBp/DboVtZp7cJRZW7ZE2eUtDZTitw0xA5CU= > We found an AA deadlock problem as shown belowed: below? * How was an =E2=80=9CAA deadlock=E2=80=9D problem detected? * Were any special analysis tools involved? =E2=80=A6 > preblem is solved. problem? Regards, Markus