From: David Miller <davem@davemloft.net>
To: vegard.nossum@gmail.com
Cc: mingo@elte.hu, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, penberg@cs.helsinki.fi, rjw@sisk.pl
Subject: Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison overwritten
Date: Fri, 18 Jul 2008 00:12:02 -0700 (PDT) [thread overview]
Message-ID: <20080718.001202.193698926.davem@davemloft.net> (raw)
In-Reply-To: <19f34abd0807180003m7bdf832g141777751d7ea563@mail.gmail.com>
From: "Vegard Nossum" <vegard.nossum@gmail.com>
Date: Fri, 18 Jul 2008 09:03:50 +0200
> > It's supposed to be 0x6b, this would be a "--"
>
> You're right! Oops. In my defence, I wrote that at 2 AM last night ;-)
>
> > Also it (more likely IMHO) could be clearing a flag with the value 0x01.
>
> It could be. But like I said in a later e-mail, the thing is likely
> sk_buff->truesize. Which is not a flags variable. It _is_ however, a
> counter, which is frequently -= and atomic_sub()ed.
skb->truesize is ever incremented or decremented by only one.
Usually it is changed by the entire packet size, or at least one MSS's
worth.
On packet free, it will be decremented by at least sizeof(struct sk_buff)
next prev parent reply other threads:[~2008-07-18 7:12 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-17 21:42 Ingo Molnar
2008-07-17 21:45 ` David Miller
2008-07-17 22:06 ` Ingo Molnar
2008-07-17 22:09 ` David Miller
2008-07-17 22:43 ` Ingo Molnar
2008-07-17 23:15 ` Vegard Nossum
2008-07-17 23:35 ` Vegard Nossum
2008-07-17 23:52 ` Ingo Molnar
2008-07-18 0:01 ` Ingo Molnar
2008-07-18 0:05 ` Vegard Nossum
2008-07-18 0:16 ` Ingo Molnar
2008-07-18 2:13 ` David Miller
2008-07-18 2:03 ` David Miller
2008-07-18 7:03 ` Vegard Nossum
2008-07-18 7:12 ` David Miller [this message]
2008-07-18 9:05 ` Ingo Molnar
2008-07-18 19:10 ` [bug] Attempt to release alive inet socket f6fac040 Ingo Molnar
2008-07-18 19:55 ` Ingo Molnar
2008-07-17 23:27 ` [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison overwritten Vegard Nossum
2008-07-17 23:56 ` Ingo Molnar
2008-07-21 11:41 ` Vegard Nossum
2008-07-18 5:46 ` Evgeniy Polyakov
2008-07-18 9:02 ` Pekka Enberg
2008-07-18 9:09 ` Ingo Molnar
2008-07-18 9:15 ` Pekka Enberg
2008-07-18 10:16 ` Evgeniy Polyakov
2008-07-18 14:44 ` Pekka Enberg
2008-07-18 14:48 ` Christoph Lameter
2008-07-18 16:07 ` Evgeniy Polyakov
2008-07-18 9:00 ` Pekka J Enberg
2008-07-18 9:11 ` Ingo Molnar
2008-07-18 9:16 ` Pekka Enberg
2008-07-18 13:54 ` Christoph Lameter
2008-07-21 9:41 ` Ingo Molnar
2008-07-21 9:52 ` Pekka Enberg
2008-07-21 10:06 ` Evgeniy Polyakov
2008-07-21 10:50 ` Ingo Molnar
2008-07-21 11:03 ` Vegard Nossum
2008-07-21 11:13 ` Ingo Molnar
2008-07-21 16:19 ` Christoph Lameter
2008-07-21 20:23 ` Vegard Nossum
2008-07-21 11:25 ` Evgeniy Polyakov
2008-07-21 11:55 ` Ingo Molnar
2008-07-21 12:57 ` Evgeniy Polyakov
2008-07-21 14:01 ` Ingo Molnar
2008-07-21 19:21 ` Ingo Molnar
2008-07-21 21:24 ` Evgeniy Polyakov
2008-07-21 23:33 ` David Miller
2008-07-22 7:50 ` Ingo Molnar
2008-07-22 13:34 ` Ingo Molnar
2008-07-23 22:31 ` David Miller
2008-07-23 22:40 ` Jeff Kirsher
2008-07-21 16:22 ` Christoph Lameter
2008-07-21 19:57 ` Evgeniy Polyakov
2008-07-21 20:05 ` Ingo Molnar
2008-07-21 20:22 ` Vegard Nossum
2008-07-18 13:55 ` Christoph Lameter
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