Re: sky2 panic in 2.6.32.1 under load (new oops)

[Stephen Hemminger]

On Thu, 24 Dec 2009 14:18:12 -0500
Michael Breuer <mbreuer@xxxxxxxxxx> wrote:

> I'll be the first to admit I don't know much about network drivers... 
> but I am wondering why __free_page(frag->page); is called in 
> skb_put_frags when the fragment length is zero. I don't see why that 
> page pointer wouldn't potentially be reused afterwords.

When using Jumbo frames, the sky2 driver allocates pages to hold
the larger part of the frame. With 9K MTU it will allocate 2 * 4K pages
and then 1K for start of frame. Then if frame is <= 1K it will drop
the extra pages.  Not sure why this broke now, I am not a VM expert.

-- 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/