"Jens Hoffrichter" <HOFFRICH@de.ibm.com> writes:
> I'm currently writing a kernel patch where it is essential to get known
> when a sk_buff is allocated. Or better said I have to get known when a
> sk_buff is effectively a new packet in the kernel-
I don't want to guess why you need that...
>
> I currently identified 3 functions in the kernel where sk_buffs are
> allocated: alloc_skb (of course), skb_linearize and pskb_expand_head. Or at
> least there new data is defined for the sk_buffs.
>
> Now I monitor a TCP session, a FTP download better said, and on the
> interface arrives around 30000 packets for 50 MB of data. But in my kernel
> patch only 2000 packets are allocated, or at least I see only the
> allocation of 2000 packets.
>
> Can anyone help me where I can find my missing packets? ;)) I need them
> badly! *GG*
There should be no skbuff allocation outside net/core/skbuff.c and all
normal[1] networking drivers also don't use private pools. Perhaps
you forgot to instrument a case there.
-Andi
[1] There may be a few unnormal ones that do; e.g. vendor driver
writers seem to frequently try to reuse skbuffs privately because they're
used to that from other OS. It is discouraged and somewhat tricky, but
possible.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Aug 23 2001 - 21:00:53 EST