Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760646AbbLCQOD (ORCPT ); Thu, 3 Dec 2015 11:14:03 -0500 Received: from mail-wm0-f52.google.com ([74.125.82.52]:38745 "EHLO mail-wm0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760589AbbLCQOB (ORCPT ); Thu, 3 Dec 2015 11:14:01 -0500 Date: Thu, 3 Dec 2015 17:13:58 +0100 From: Michal Hocko To: Pavel Machek Cc: davem@davemloft.net, Andrew Morton , kernel list , jcliburn@gmail.com, chris.snook@gmail.com, netdev@vger.kernel.org, "Rafael J. Wysocki" , linux-mm@kvack.org, nic-devel@qualcomm.com, ronangeles@gmail.com, ebiederm@xmission.com Subject: Re: [PATCH net] atl1c: Improve driver not to do order 4 GFP_ATOMIC allocation Message-ID: <20151203161357.GJ9264@dhcp22.suse.cz> References: <20151126163413.GA3816@amd> <20151127082010.GA2500@dhcp22.suse.cz> <20151128145113.GB4135@amd> <20151203155905.GA31974@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20151203155905.GA31974@amd> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1803 Lines: 48 On Thu 03-12-15 16:59:05, Pavel Machek wrote: > > atl1c driver is doing order-4 allocation with GFP_ATOMIC > priority. That often breaks networking after resume. Switch to > GFP_KERNEL. Still not ideal, but should be significantly better. > > atl1c_setup_ring_resources() is called from .open() function, and > already uses GFP_KERNEL, so this change is safe. Thanks for updating the changelog > Signed-off-by: Pavel Machek Acked-by: Michal Hocko > > diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c > index 2795d6d..afb71e0 100644 > --- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c > +++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c > @@ -1016,10 +1016,10 @@ static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter) > sizeof(struct atl1c_recv_ret_status) * rx_desc_count + > 8 * 4; > > - ring_header->desc = pci_alloc_consistent(pdev, ring_header->size, > - &ring_header->dma); > + ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size, > + &ring_header->dma, GFP_KERNEL); > if (unlikely(!ring_header->desc)) { > - dev_err(&pdev->dev, "pci_alloc_consistend failed\n"); > + dev_err(&pdev->dev, "could not get memory for DMA buffer\n"); > goto err_nomem; > } > memset(ring_header->desc, 0, ring_header->size); > > > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- Michal Hocko SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/