netdev - Re: bug report

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Message-Id: <20080606225643.8be222a9.akpm@linux-foundation.org>
Date:	Fri, 6 Jun 2008 22:56:43 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Oliver Pinter" <oliver.pntr@...il.com>
Cc:	zsirmo@...rmo.hu, linux-kernel@...r.kernel.org,
	"Ingo Molnar" <mingo@...e.hu>, netdev <netdev@...r.kernel.org>,
	Matt Carlson <mcarlson@...adcom.com>,
	Michael Chan <mchan@...adcom.com>
Subject: Re: bug report

On Sat, 7 Jun 2008 03:44:32 +0200 "Oliver Pinter" <oliver.pntr@...il.com> wrote:

> Add Ingon and netdev to CC
> 
> 
> On 6/6/08, Zsiros Attila <zsirmo@...il.com> wrote:
> > Hy!
> >
> > I have a problem.
> >
> > http://www.cyberszeg.hu/log/kern.log
> > http://www.cyberszeg.hu/log/config-2.6.25.4
> > http://www.cyberszeg.hu/log/lspci.txt
> > http://www.cyberszeg.hu/log/ifconfig.txt
> >

: Jun  6 14:03:07 www kernel: [ 5897.660390] NETDEV WATCHDOG: eth0: transmit timed out
: Jun  6 14:03:07 www kernel: [ 5897.660398] tg3: eth0: transmit timed out, resetting
: Jun  6 14:03:07 www kernel: [ 5897.660432] tg3: DEBUG: MAC_TX_STATUS[0000001e] MAC_RX_STATUS[0000000e]
: Jun  6 14:03:07 www kernel: [ 5897.660454] tg3: DEBUG: RDMAC_STATUS[00000000] WDMAC_STATUS[00000000]
: Jun  6 14:03:07 www kernel: [ 5897.762983] tg3: tg3_stop_block timed out, ofs=1800 enable_bit=2
: Jun  6 14:03:07 www kernel: [ 5897.864168] tg3: tg3_stop_block timed out, ofs=c00 enable_bit=2
: Jun  6 14:03:07 www kernel: [ 5897.965619] tg3: tg3_stop_block timed out, ofs=4800 enable_bit=2

That looks like a driver failure.

: Jun  6 14:03:07 www kernel: [ 5898.096689] tg3: eth0: Link is down.
: Jun  6 14:03:11 www kernel: [ 5901.633931] tg3: eth0: Link is up at 1000 Mbps, full duplex.
: Jun  6 14:03:11 www kernel: [ 5901.633937] tg3: eth0: Flow control is on for TX and on for RX.
: Jun  6 14:04:11 www kernel: [ 6464.556309] clamscan: page allocation failure. order:3, mode:0x4020
: Jun  6 14:04:11 www kernel: [ 6464.556319] Pid: 24139, comm: clamscan Not tainted 2.6.25.4 #1
: Jun  6 14:04:11 www kernel: [ 6464.556325] 
: Jun  6 14:04:11 www kernel: [ 6464.556326] Call Trace:
: Jun  6 14:04:11 www kernel: [ 6464.556329]  <IRQ>  [__alloc_pages+544/890] __alloc_pages+0x220/0x37a
: Jun  6 14:04:11 www kernel: [ 6464.556353]  [tcp_v4_do_rcv+186/504] tcp_v4_do_rcv+0xba/0x1f8
: Jun  6 14:04:11 www kernel: [ 6464.556359]  [ktime_get+12/98] ktime_get+0xc/0x62
: Jun  6 14:04:11 www kernel: [ 6464.556364]  [__netdev_alloc_skb+23/49] __netdev_alloc_skb+0x17/0x31
: Jun  6 14:04:11 www kernel: [ 6464.556370]  [__slab_alloc+330/1403] __slab_alloc+0x14a/0x57b
: Jun  6 14:04:11 www kernel: [ 6464.556374]  [__netdev_alloc_skb+23/49] __netdev_alloc_skb+0x17/0x31
: Jun  6 14:04:11 www kernel: [ 6464.556379]  [__netdev_alloc_skb+23/49] __netdev_alloc_skb+0x17/0x31
: Jun  6 14:04:11 www kernel: [ 6464.556384]  [__kmalloc_track_caller+185/190] __kmalloc_track_caller+0xb9/0xbe
: Jun  6 14:04:11 www kernel: [ 6464.556391]  [__alloc_skb+86/305] __alloc_skb+0x56/0x131
: Jun  6 14:04:11 www kernel: [ 6464.556395]  [__netdev_alloc_skb+23/49] __netdev_alloc_skb+0x17/0x31
: Jun  6 14:04:11 www kernel: [ 6464.556408]  [_end+128472975/2130444940] :tg3:tg3_alloc_rx_skb+0x8f/0x17e
: Jun  6 14:04:11 www kernel: [ 6464.556418]  [_end+128493403/2130444940] :tg3:tg3_poll+0x6e8/0x922
: Jun  6 14:04:11 www kernel: [ 6464.556426]  [net_rx_action+134/309] net_rx_action+0x86/0x135
: Jun  6 14:04:11 www kernel: [ 6464.556433]  [__do_softirq+102/212] __do_softirq+0x66/0xd4
: Jun  6 14:04:11 www kernel: [ 6464.556439]  [call_softirq+28/48] call_softirq+0x1c/0x30
: Jun  6 14:04:11 www kernel: [ 6464.556444]  [do_softirq+48/107] do_softirq+0x30/0x6b
: Jun  6 14:04:11 www kernel: [ 6464.556448]  [do_IRQ+114/212] do_IRQ+0x72/0xd4
: Jun  6 14:04:11 www kernel: [ 6464.556453]  [ret_from_intr+0/10] ret_from_intr+0x0/0xa

The driver is trying to do a 32 kbyte GFP_ATOMIC memory allocation. 
rofl, good luck with that.

But the netwoking code sould survive this.

<12 billion more page allocation failures>

Are you using jumbo frames or have you manually set the MTU to
something enormous?  Because 32k is a pretty crazy amount of memory for
the driver to be trying to allocate - it's going to fail all over the
place, as you have discovered.


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