Return-path: Received: from mail-vc0-f174.google.com ([209.85.220.174]:44988 "EHLO mail-vc0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751503AbaJNIZC (ORCPT ); Tue, 14 Oct 2014 04:25:02 -0400 Received: by mail-vc0-f174.google.com with SMTP id hq12so7078434vcb.19 for ; Tue, 14 Oct 2014 01:25:01 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <5FF020A1CFFEEC49BD1E09530C4FF5951821936F03@SC-VEXCH1.marvell.com> References: <5FF020A1CFFEEC49BD1E09530C4FF5951819DB12F1@SC-VEXCH1.marvell.com> <5FF020A1CFFEEC49BD1E09530C4FF5951821351855@SC-VEXCH1.marvell.com> <5FF020A1CFFEEC49BD1E09530C4FF5951821936285@SC-VEXCH1.marvell.com> <5FF020A1CFFEEC49BD1E09530C4FF5951821936BBC@SC-VEXCH1.marvell.com> <5FF020A1CFFEEC49BD1E09530C4FF5951821936F03@SC-VEXCH1.marvell.com> Date: Tue, 14 Oct 2014 10:25:01 +0200 Message-ID: (sfid-20141014_102526_106205_2E5C1465) Subject: Re: mwifiex_usb_submit_rx_urb: dev_alloc_skb failed when conected to 5GHz From: Belisko Marek To: Amitkumar Karwar Cc: "linux-wireless@vger.kernel.org" , Avinash Patil Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: Hi Amitkumar, On Tue, Oct 14, 2014 at 9:08 AM, Amitkumar Karwar wrote: > Hi Marek, > >>I tried both (slightly modified as we're in 3.9 kernel) but issue is >>still reproducible. My patch against 3.9 sources: > > Thanks a lot for the tests. > >>One thing which is not yet still clear to me why kernel console is >>completely unresponsive when receiving packets in high rates. When use >>iperf (on client) with -b40m it is OK but when increase to -b100m then >>console is completely unresponsive until iperf finish. > > Does the system recover when "-b100M" iperf is finished? Can we run iperf with "-b40M" later? > Do you see "dev_alloc_skb failed" messages in dmesg when console is unresponsive? When we get "dev_alloc_skb failed" then interface is dead (cannot ping ...) so no recovery is possible only system reboot. I don't see dev_alloc_skb failed when console is unresponsive. > >>Any other ideas >>what to change to check? Thanks. > > Could you please share dmesg log with dynamic debug enabled (using attached script) captured when the problem occurs? I tried to capture logs but when enable DYNAMIC_DEBUG I cannot reproduce issue (running test > 30 minutes without allocation failure). > > Best regards, > Amit BR, marek -- as simple and primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Freelance Developer Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite twitter: #opennandra web: http://open-nandra.com