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 B9E0C1E2122; Wed, 7 Aug 2024 13:49:36 +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=1723038576; cv=none; b=kfU7njqUoC8kBaP86Yve7x8JsJNFvPRdDUnCcNUrQgj99jXjkk3A4TcvFGrmjzpJvPdhmdAmSjwG2K2UGjf6vT8dFFKZZCFxqPcb06DmQ4uoimiwBKgo7GMQ0uaMLyAbiPV2IHQ+7KDUFOiailh9jdQYhXS1iU+JeEKWmoyVUB0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723038576; c=relaxed/simple; bh=iplRde1Hac6HbYja1csB4kDBR8wsgdL2oD7JgPyPcd4=; h=From:To:Cc:Subject:References:Date:In-Reply-To:Message-ID: MIME-Version:Content-Type; b=DQKKQGiPL5f7Ub3qCtFGuipnYkleb0Y9vvdaaGJ8Vb1p4ZuS1IKq9U2YZN7Exaa0NvMLP6rP4h5m34PhrABU3WQBddr9y8CEw4xh6YqQV9sKXb3XkuYslRWQMuxFz02KgV3dFCHMSUwtfHcVbRgXunQIJ46qDddEutSEyoR4ZlU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=goUs2Map; 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="goUs2Map" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ECAACC32781; Wed, 7 Aug 2024 13:49:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723038576; bh=iplRde1Hac6HbYja1csB4kDBR8wsgdL2oD7JgPyPcd4=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=goUs2MapFj2GzURTXw/pJLduJPreiVgKU5XVfdJ4Z9NC9gC71DemnoLN92K3X/HZY X/bugoO9bxq6SFgc5Rk+czvVYw30FfHqx5YGdAsBwbbs+0nHtcj1Uixw8gaZLBVyQh hGQtjqebP4RHeUvwtpijYW5MLtuMrqSw4mCBrVoJEmIodN1SMq/LQpPBq8r7DcxEKT VOiozNcExpslRK34yvO+9mEXc/dbc8xb7s0ng9LKGVGU+390sLguvTYLDxh7WeNszU 0HbI4Tq7CKUts3/YLmAJn8N15+D2aETWbMl1u2yyXveGPpcIubmevWtRAOHqxLrf+u zIWk0O1AnoLbQ== From: Kalle Valo To: Chris Bainbridge Cc: linux-wireless@vger.kernel.org, benjamin.berg@intel.com, miriam.rachel.korenblit@intel.com, regressions@lists.linux.dev, johannes@sipsolutions.net Subject: Re: [REGRESSION] bisected: iwlwifi: use already mapped data when TXing an AMSDU References: <87le18ile6.fsf@kernel.org> Date: Wed, 07 Aug 2024 16:49:32 +0300 In-Reply-To: (Chris Bainbridge's message of "Wed, 7 Aug 2024 13:34:38 +0100") Message-ID: <87o7644f4j.fsf@kernel.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Chris Bainbridge writes: > On Wed, 7 Aug 2024 at 13:10, Kalle Valo wrote: >> >> Chris Bainbridge writes: >> >> > I hit the following bug in 6.11.0-rc2. Reverting the offending commit >> > fixes the issue. This happens immediately when I run `iperf3 -bidir`. >> >> [...] >> >> > [ 42.873868] ------------[ cut here ]------------ >> > [ 42.873989] WARNING: CPU: 1 PID: 529 at >> > drivers/net/wireless/intel/iwlwifi/pcie/tx.c:1836 >> > iwl_pcie_get_sgt_tb_phys >> > (drivers/net/wireless/intel/iwlwifi/pcie/tx.c:1836) iwlwifi >> >> Does the connection still work after the warning? > > Not really. It is functional but tx throughput is severely degraded, > iperf shows ~1mbit/sec instead of the usual ~600mbit. Rx throughput > (measured with `iperf -c ... -R`) doesn't seem to be affected. Ok, so a quite severe issue. Hopefully Intel can find a fix, otherwise we need to consider should we revert commit 90db50755228 ("wifi: iwlwifi: use already mapped data when TXing an AMSDU") for v6.11. -- https://patchwork.kernel.org/project/linux-wireless/list/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches