netdev - Re: ICMP packets - ll_temac with Microblaze

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Date:	Wed, 21 Dec 2011 11:54:25 +0100
From:	Michal Simek <monstr@...str.eu>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	David Miller <davem@...emloft.net>,
	John Williams <john.williams@...alogix.com>,
	netdev@...r.kernel.org
Subject: Re: ICMP packets - ll_temac with Microblaze

Eric Dumazet wrote:
> Le mercredi 21 décembre 2011 à 11:41 +0100, Michal Simek a écrit :
> 
>> yes, page size is 4k.
>>
>> Here is the log for allocation - origin size for MTU 9000 is 0x2420(9248) and size after
>> overhead is 0x3f40(16192)
>>
>> kmalloc_node_track_caller size 00002420, SKB_WITH_OVERHEAD(ksize(data)) 00003f40
>> skb->head     c7870000
>> skb->data     c7870000
>> skb->tail     c7870000
>> skb->truesize 000040c0
>> skb->end      c7873f40
>>
> 
> So basically truesize is bigger than previous kernel, and you hit a
> socket limit.  (RCVBUF ?)

Where is that limit setup?

Michal


-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian
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