From: "David S. Miller" <davem@davemloft.net>
To: mpm@selenic.com
Cc: jeffrey.t.kirsher@intel.com, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: [BUG] netpoll is unable to handle skb's using packet split
Date: Mon, 14 Nov 2005 21:41:30 -0800 (PST) [thread overview]
Message-ID: <20051114.214130.57199557.davem@davemloft.net> (raw)
In-Reply-To: <20051114.213922.16377460.davem@davemloft.net>
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 14 Nov 2005 21:39:22 -0800 (PST)
> From: Matt Mackall <mpm@selenic.com>
> Date: Mon, 14 Nov 2005 21:23:58 -0800
>
> > What is "packet split" in this context?
>
> It's a mode of buffering used by the e1000 driver.
BTW, the issue is that in packet split mode, the e1000 driver is
feeding paged based non-linear SKBs into the stack on receive which is
completely legal but aparently netpoll or something parsing netpoll RX
packets does not handle it properly.
That's why the reporter suggested that perhaps an skb_linearize()
call could be added to fix the problem, but it is unknown whether
that call can be made in the context in which it would be needed.
next prev parent reply other threads:[~2005-11-15 5:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-14 21:15 [BUG] netpoll is unable to handle skb's using packet split Jeff Kirsher
2005-11-15 5:23 ` Matt Mackall
2005-11-15 5:39 ` David S. Miller
2005-11-15 5:41 ` David S. Miller [this message]
2005-11-15 6:29 ` Matt Mackall
2005-11-15 6:45 ` David S. Miller
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