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 2901178F54 for ; Wed, 1 Oct 2025 20:30:38 +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=1759350639; cv=none; b=M28xTd7AsLGW3l5Yn4yDPPOHcxA0jh0tZWU0SFfSvGcLsz6v4U4QQ16eQFvtnpDBmvmycHe0m6K0qsI4R5AjexfzoWTa7fNQWljJTnr3TBvdlCbVWCRAeQFBxll/Zr1G6bYkqTUqnG5Lfr2NDTx5dRVzFIk8wHsPp1X4feUcLrw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759350639; c=relaxed/simple; bh=lZxKbMnqJYRayTwyqEvuQyl1l+ac79n4DxAadQnyRsk=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=dB1gs0wlEg5qb9gag5S3rLeRTd9n/PbxtMmCEazG1d2tqS2PU2bgZJ0KUTtjPMRDpqsA1Gc3d/NyFpzXQ+i5yrTmtLkU9rIUAGTYYa0JVy7bFiKwfculfgtRqqLxhiwEGxSp8NV2S8bYmYhaQYl0xgDSe8XIxntfTKhwU1aWCsE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OJyAZdEt; 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="OJyAZdEt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 78914C4CEF1; Wed, 1 Oct 2025 20:30:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1759350638; bh=lZxKbMnqJYRayTwyqEvuQyl1l+ac79n4DxAadQnyRsk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=OJyAZdEtMeMUyePm4UJ7+r6/jzAMQDrD8ddgaKao2i9oh6IYLjnFCZNxIxPvLuac7 be7tCiDP73L8vquVtwvjighdqLZQ5xHymh2V2/S/vIy2So/+i/N47OwV+0pCc7CVY5 bwLnvDW7/hAv7l0nBPhRNCMTHuWSvsEkcrSv3CFcK49efkWnnP8xgQmfhz0lKCuZHQ teQOyr+UKO6/ycQ2p+zgAaqLVqJ3HbTkz+V8v7LDo96SVjikyJD5IFQVj9l3Mhk5TR Ctg6JcsAyGBcoFpKW43AcGm1RrtHGR17iTVmxSetThWfoGVmwC/SNTO+MwVqBAXBny cPx695gLf3dqQ== Date: Wed, 1 Oct 2025 13:30:37 -0700 From: Jakub Kicinski To: Willem de Bruijn Cc: Kuniyuki Iwashima , edumazet@google.com, fw@strlen.de, netdev@vger.kernel.org, pabeni@redhat.com Subject: Re: deadlocks on pernet_ops_rwsem Message-ID: <20251001133037.0ab6952c@kernel.org> In-Reply-To: References: <20251001102223.1b8e9702@kernel.org> <20251001185310.33321-1-kuniyu@google.com> <20251001122618.4cf31f3b@kernel.org> Precedence: bulk X-Mailing-List: netdev@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, 1 Oct 2025 15:33:56 -0400 Willem de Bruijn wrote: > > > Was there any update on packages (especially qemu?) used by > > > CI around 2025-09-18 ? > > > > No updates according to the logs. First hit was on Thursday so I thought > > maybe it came from Linus. But looking at the branches we fast forwarded > > 2025-09-18--21-00 and there were 2 hits earlier that day (2025-09-18--03-00, > > 2025-09-18--15-00) > > Is there a good SHA1 around the time of the earliest report? > > There do not seem to be any recent changes to rwsem, let alone > specifically to pernet_ops_rwsem. The first time it triggered when net-next was at 152ba35c04ad and net at 09847108971a, CI branch contents: https://netdev.bots.linux.dev/static/nipa/branch_deltas/net-next-2025-09-18--03-00.html The previous one (so the branch before the first time it triggered) had base commits of 6b957c0a36f5 09847108971a. If you click on the link above you can go back / forward in the branch contents.