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Eric Dumazet 8b5c171bb3 neigh: new unresolved queue limits 
Le mercredi 09 novembre 2011 à 16:21 -0500, David Miller a écrit :
> From: David Miller <davem@davemloft.net>
> Date: Wed, 09 Nov 2011 16:16:44 -0500 (EST)
>
> > From: Eric Dumazet <eric.dumazet@gmail.com>
> > Date: Wed, 09 Nov 2011 12:14:09 +0100
> >
> >> unres_qlen is the number of frames we are able to queue per unresolved
> >> neighbour. Its default value (3) was never changed and is responsible
> >> for strange drops, especially if IP fragments are used, or multiple
> >> sessions start in parallel. Even a single tcp flow can hit this limit.
> >  ...
> >
> > Ok, I've applied this, let's see what happens :-)
>
> Early answer, build fails.
>
> Please test build this patch with DECNET enabled and resubmit.  The
> decnet neigh layer still refers to the removed ->queue_len member.
>
> Thanks.

Ouch, this was fixed on one machine yesterday, but not the other one I
used this morning, sorry.

[PATCH V5 net-next] neigh: new unresolved queue limits

unres_qlen is the number of frames we are able to queue per unresolved
neighbour. Its default value (3) was never changed and is responsible
for strange drops, especially if IP fragments are used, or multiple
sessions start in parallel. Even a single tcp flow can hit this limit.

$ arp -d 192.168.20.108 ; ping -c 2 -s 8000 192.168.20.108
PING 192.168.20.108 (192.168.20.108) 8000(8028) bytes of data.
8008 bytes from 192.168.20.108: icmp_seq=2 ttl=64 time=0.322 ms

Signed-off-by: David S. Miller <davem@davemloft.net>
 		2011-11-14 00:47:54 -05:00
..
netfilter decnet: Reduce switch/case indent 2011-07-01 16:11:15 -07:00
Kconfig [NET]: Rethink mark field in struct flowi 2006-12-02 21:21:39 -08:00
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
README Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
TODO Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
af_decnet.c decnet: Reduce switch/case indent 2011-07-01 16:11:15 -07:00
dn_dev.c rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER 2011-08-02 04:29:23 -07:00
dn_fib.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
dn_neigh.c neigh: new unresolved queue limits 2011-11-14 00:47:54 -05:00
dn_nsp_in.c decnet: Reduce switch/case indent 2011-07-01 16:11:15 -07:00
dn_nsp_out.c decnet: Convert to use flowidn where applicable. 2011-03-12 15:08:55 -08:00
dn_route.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
dn_rules.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
dn_table.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
dn_timer.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
sysctl_net_decnet.c decnet: Reduce switch/case indent 2011-07-01 16:11:15 -07:00

README 

                       Linux DECnet Project
                      ======================

The documentation for this kernel subsystem is available in the
Documentation/networking subdirectory of this distribution and also
on line at http://www.chygwyn.com/DECnet/

Steve Whitehouse <SteveW@ACM.org>