Dear Amitkumar Karwar, On Thu, Sep 11, 2014 at 5:09 PM, Amitkumar Karwar <akarwar@xxxxxxxxxxx> wrote: > Hi BR, > >> >> I'm using 3.9 mainline mwifiex driver for wireless usb card. Doing some >> throughput testing (with iperf) in 5GHz I got following failures: >> [ 221.521799] usb 1-1: mwifiex_usb_submit_rx_urb: dev_alloc_skb failed > > This is skb allocation failure returned by kernel. 4k buffer is always allocated for Rx packets. This issue doesn't seem to be specific to 5Ghz. OK. But I cannot reproduce this issue when connected to 2.4GHz (same steps as described below). >. >> >> I checked which which size fails to allocate and it's 4096 bytes. I was >> looking to changes in never kernel releases but I cannot find anything >> obvious. When connected to 2.4GHz I cannot reproduce issue though. I'm >> using FW version mwifiex 1.0 (14.68.29.p26). >> > > Could you please provide the platform details? > How often the problem occurs during throughput testing? Are there any specific steps? I can reproduce problem 100% by running iperf as server on board where wifi is connected to (iperf -s -u -w1M -i1) and connecting with iperf client from other PC (iperf -c IPADDR -u -b 100m). Then immediately I can see allocation failures. If you need more info please let me know. Thanks. > > Regards, > Amitkumar Karwar 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 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
