From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oliver Neukum Subject: Re: [PATCH V2] cdc_ncm: Add support for moving NDP to end of NCM frame Date: Mon, 06 Jul 2015 12:08:16 +0200 Message-ID: <1436177296.8225.25.camel@suse.com> References: <1435787748-30393-1-git-send-email-mrkiko.rs@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: linux-usb@vger.kernel.org, netdev@vger.kernel.org To: Enrico Mioso Return-path: Received: from cantor2.suse.de ([195.135.220.15]:32770 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754021AbbGFKJS (ORCPT ); Mon, 6 Jul 2015 06:09:18 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On Sun, 2015-07-05 at 12:21 +0200, Enrico Mioso wrote: > When sending lots of small packets, this patch will generate an "Unable to > handle kernel paging request" in the memset call: > ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); > And I don't know why. > Any comment or suggestion would be greatly apreciated. > This has been reproduced in a QEMU X86 VM, from kernel 4.0.4 to current git. I cannot see how this can fail and the preceding copy work. Can you post the full message? Regards Oliver