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 5E46640F8E9; Wed, 29 Apr 2026 16:21:54 +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=1777479714; cv=none; b=PKGoSeYpjEYfnnLjjfhx9EyRjGLctIhHJ04v8U76EcF7k1XMqufT4FBIFhRC3Espr3xCxJHjkNKZK8z4ZnA5Rmzv6ksgyJFRZh1xjx2k76ktcmlYDdhwAHVY6O9UyUIPdhNzCXoMkaEhG9UXi7keSrkouc5I/kgUN14AFiuqN54= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777479714; c=relaxed/simple; bh=HhOc0548G9kfNYjkAtqOMROBce9JOmnelyqUUYgADxA=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References; b=Efg6ks0SNL3bo7eQh+gdkkDuYuRXIAyYpA/oc/Tb6UhhFbDtaUgUYo6vaStko5j97SqLkffZ1ZSF/xu5jg0N5UQPhAqi7AGpDCcVOw57ANWQQvYBb++W3/WIDKQw4yMv8pMUBNA/59owBQ3CKLg+kZS8mg0DwWI42I2AboNvtXQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ncjJDjms; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ncjJDjms" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3AB6C19425; Wed, 29 Apr 2026 16:21:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777479713; bh=HhOc0548G9kfNYjkAtqOMROBce9JOmnelyqUUYgADxA=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=ncjJDjmsKo9FHZ5Eg7sqZvXvkcxwteBzdLsgHilIwmzFFXfebJC1KQLChivIPNPOY F6nHcxBEL4prAYMapymK+4Zx2kCF9kFdwuGTPvD7FH4VIHU6+RUJPcOunfLMiMXmez 2nk1IkpWcEv15CZZuhexl/ieqbls+cHPm+5q0X60wTBlUvYeZdM2q2ZUgG7MShV50N uk2BTVInoSmHd1UH1wJ92F1nxxktMiPYA/Ne5ZHTyDQkX75RYoZeFOnotEh1aFVukl 1vlQ8hC4pDnvkhLSonpnMwoyGzduurZofQ8mbZYKKO+fImAK9FMdH0fchiD/xNhSdP rLy7XtIIf6G8g== Date: Wed, 29 Apr 2026 06:21:51 -1000 Message-ID: From: Tejun Heo To: Martin Pitt Cc: regressions@lists.linux.dev, cgroups@vger.kernel.org, lizefan.x@bytedance.com, hannes@cmpxchg.org Subject: Re: [REGRESSION] 6.9.11: systemd hangs in cgroup_drain_dying during cleanup after podman operations In-Reply-To: References: Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Hello, Thanks for the report. The dmesg you attached has only a partial sysrq-t - the dying-task stacks I need were pushed out of the ring buffer. Could you increase log_buf_len, reproduce, trigger sysrq-t, and send the resulting dmesg? Thanks. -- tejun