Return-Path: <linux-kernel-owner+w=401wt.eu-S1760843AbYFQXh2@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1760843AbYFQXh2 (ORCPT <rfc822;w@1wt.eu>);
	Tue, 17 Jun 2008 19:37:28 -0400
Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757634AbYFQXhO
	(ORCPT <rfc822;linux-kernel-outgoing>);
	Tue, 17 Jun 2008 19:37:14 -0400
Received: from webmail.e-teleport.net ([213.190.83.68]:52560 "EHLO
	mail.imsnet.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1756221AbYFQXhM (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Tue, 17 Jun 2008 19:37:12 -0400
Message-ID: <48584AA4.8040801@e-teleport.net>
Date: Wed, 18 Jun 2008 01:37:08 +0200
From: =?ISO-8859-1?Q?S=E9guier_R=E9gis?= <rseguier@e-teleport.net>
User-Agent: Thunderbird 2.0.0.14 (Windows/20080421)
MIME-Version: 1.0
To: Francois Romieu <romieu@fr.zoreil.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
       Arjan van de Ven <arjan@infradead.org>, alan@redhat.com,
       netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net: via-velocity.c fix sleep-with-spinlock bug during
 MTU change
References: <20080531184615.350bac00@infradead.org> <20080603134019.df2f51d4.akpm@linux-foundation.org> <20080603215155.GA9712@electric-eye.fr.zoreil.com> <20080604215909.GA17446@electric-eye.fr.zoreil.com> <20080614212341.GA12976@electric-eye.fr.zoreil.com> <4856DA62.7080803@e-teleport.net> <20080617214538.GA6388@electric-eye.fr.zoreil.com>
In-Reply-To: <20080617214538.GA6388@electric-eye.fr.zoreil.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 4154
Lines: 91

Francois Romieu a ?crit :
> S?guier R?gis <rseguier@e-teleport.net> :
> [...]
>   
>> The mtu change doesn't work :
>>
>> Jun 16 23:22:34 apollo kernel: ------------[ cut here ]------------
>> Jun 16 23:22:34 apollo kernel: WARNING: at arch/x86/kernel/pci-dma.c:482 
>> dma_free_coherent+0x3a/0x9c()
>> Jun 16 23:22:34 apollo kernel: Pid: 1527, comm: ip Tainted: G        W 
>> 2.6.26-rc6EPIA_SN_VB7001 #3
>> Jun 16 23:22:34 apollo kernel:  [<c0115fe5>] warn_on_slowpath+0x3b/0x5f
>> Jun 16 23:22:34 apollo kernel:  [<c0133940>] 
>> get_page_from_freelist+0x24a/0x36f
>> Jun 16 23:22:34 apollo kernel:  [<c012d86b>] handle_IRQ_event+0x1a/0x3f
>> Jun 16 23:22:34 apollo kernel:  [<c0241193>] velocity_free_rd_ring+0xa5/0xb6
>> Jun 16 23:22:34 apollo kernel:  [<c0144752>] kfree+0x6a/0x72
>> Jun 16 23:22:34 apollo kernel:  [<c0241193>] velocity_free_rd_ring+0xa5/0xb6
>> Jun 16 23:22:34 apollo kernel:  [<c0105816>] dma_free_coherent+0x3a/0x9c
>> Jun 16 23:22:34 apollo kernel:  [<c02411eb>] 
>> velocity_free_dma_rings+0x47/0x4d
>> Jun 16 23:22:34 apollo kernel:  [<c024225b>] velocity_change_mtu+0xf6/0x157
>> Jun 16 23:22:34 apollo kernel:  [<c02856c4>] dev_set_mtu+0x2a/0x4f
>> Jun 16 23:22:34 apollo kernel:  [<c0286642>] dev_ioctl+0x4ab/0x530
>> Jun 16 23:22:34 apollo kernel:  [<c012e4cb>] handle_fasteoi_irq+0x74/0x77
>> Jun 16 23:22:34 apollo kernel:  [<c010479b>] do_IRQ+0x50/0x60
>> Jun 16 23:22:34 apollo kernel:  [<c027d785>] sock_ioctl+0x0/0x177
>>     
>
> Does the patch below make a difference ?
>
> diff --git a/drivers/net/via-velocity.c b/drivers/net/via-velocity.c
> index 71a5133..fa303da 100644
> --- a/drivers/net/via-velocity.c
> +++ b/drivers/net/via-velocity.c
> @@ -1274,7 +1274,7 @@ static void velocity_free_rd_ring(struct velocity_info *vptr)
>  				 PCI_DMA_FROMDEVICE);
>  		rd_info->skb_dma = (dma_addr_t) NULL;
>  
> -		dev_kfree_skb(rd_info->skb);
> +		dev_kfree_skb_any(rd_info->skb);
>  		rd_info->skb = NULL;
>  	}
>  
> @@ -1336,7 +1336,7 @@ static void velocity_free_td_ring_entry(struct velocity_info *vptr,
>  				td_info->skb_dma[i] = (dma_addr_t) NULL;
>  			}
>  		}
> -		dev_kfree_skb(td_info->skb);
> +		dev_kfree_skb_any(td_info->skb);
>  		td_info->skb = NULL;
>  	}
>  }
>   
Idem.

Jun 18 01:30:15 apollo kernel: ------------[ cut here ]------------
Jun 18 01:30:15 apollo kernel: WARNING: at arch/x86/kernel/pci-dma.c:482 
dma_free_coherent+0x3a/0x9c()
Jun 18 01:30:15 apollo kernel: Pid: 1401, comm: ip Not tainted 
2.6.26-rc6EPIA_SN_VB7001 #4
Jun 18 01:30:15 apollo kernel:  [<c0115fe5>] warn_on_slowpath+0x3b/0x5f
Jun 18 01:30:15 apollo kernel:  [<c0133b19>] 
__alloc_pages_internal+0xb4/0x349
Jun 18 01:30:15 apollo kernel:  [<c0112bfd>] hrtick_start_fair+0x67/0xfd
Jun 18 01:30:15 apollo kernel:  [<c011414f>] check_preempt_wakeup+0x9d/0xbb
Jun 18 01:30:15 apollo kernel:  [<c0144752>] kfree+0x6a/0x72
Jun 18 01:30:15 apollo kernel:  [<c0241193>] velocity_free_rd_ring+0xa5/0xb6
Jun 18 01:30:15 apollo kernel:  [<c0105816>] dma_free_coherent+0x3a/0x9c
Jun 18 01:30:15 apollo kernel:  [<c02411eb>] 
velocity_free_dma_rings+0x47/0x4d
Jun 18 01:30:15 apollo kernel:  [<c024225b>] velocity_change_mtu+0xf6/0x157
Jun 18 01:30:15 apollo kernel:  [<c02856c4>] dev_set_mtu+0x2a/0x4f
Jun 18 01:30:15 apollo kernel:  [<c0286642>] dev_ioctl+0x4ab/0x530
Jun 18 01:30:15 apollo kernel:  [<c013964a>] __do_fault+0x256/0x28e
Jun 18 01:30:15 apollo kernel:  [<c027d8d7>] sock_ioctl+0x152/0x177
Jun 18 01:30:15 apollo kernel:  [<c027d785>] sock_ioctl+0x0/0x177
Jun 18 01:30:15 apollo kernel:  [<c0150b4a>] vfs_ioctl+0x16/0x48
Jun 18 01:30:15 apollo kernel:  [<c0150d5a>] do_vfs_ioctl+0x1de/0x1f1
Jun 18 01:30:15 apollo kernel:  [<c0150dae>] sys_ioctl+0x41/0x5b
Jun 18 01:30:15 apollo kernel:  [<c010291d>] sysenter_past_esp+0x6a/0x91
Jun 18 01:30:15 apollo kernel:  =======================
Jun 18 01:30:15 apollo kernel: ---[ end trace abc2c54f7fac91dc ]---

-- 
R?gis
--
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/