* dst cache overflow, again
@ 2005-02-21 13:21 Piotr Kowalczyk
2005-02-21 16:20 ` Phil Oester
0 siblings, 1 reply; 2+ messages in thread
From: Piotr Kowalczyk @ 2005-02-21 13:21 UTC (permalink / raw)
To: linux-kernel
Hi all,
I'm suffering from destination cache overflow on router running kernel
2.6.10. This wouldn't be anything special if not different numbers
reported by slabinfo and the real state. It's worth to mention that
there was no problems with old 2.4.x here.
user@somemachine:~$ cat /proc/slabinfo | grep ip_dst_cache; \
> cat /proc/net/rt_cache | wc -l; \
> /sbin/ip ro sh cache | grep cache | wc -l;
ip_dst_cache 153870 154530 256 15 1 : tunables 120 60
8 : slabdata 10302 10302 0
2159
2247
I'm increasing /proc/sys/net/ipv4/route/max_size, but the value reported
by slabinfo also slowly but steady is going up.
There is similar issue here (maybe even more),
http://www.uwsg.iu.edu/hypermail/linux/net/0312.3/0000.html, but
unfortunatelly stayed without answer.
Please give some hints about that, or if I'm wrong (meaning that is not
a bug), tell me what to do - I don't want to reboot this router every
week and CC: me (I'm not subscribed to the list).
I'm also wondering if tuning of rhash_entries= boot parameter could help?
Thank you,
Piotr Kowalczyk
ps.
Output of rtstat, in case it would help:
user@somemachine:~$ ./rtstat
size IN: hit tot mc no_rt bcast madst masrc OUT: hit tot
mc GC: tot ignored goal_miss ovrf HASH: in_search out_search
152294 5094 5563 0 98 0 0 0 153 26
0 5687 5685 2 0 3199 27
152377 4902 5851 0 108 0 0 0 153 20
0 5980 5978 2 0 3284 39
152416 4932 5526 0 76 0 0 0 128 26
0 5629 5627 2 0 3080 22
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: dst cache overflow, again
2005-02-21 13:21 dst cache overflow, again Piotr Kowalczyk
@ 2005-02-21 16:20 ` Phil Oester
0 siblings, 0 replies; 2+ messages in thread
From: Phil Oester @ 2005-02-21 16:20 UTC (permalink / raw)
To: Piotr Kowalczyk; +Cc: linux-kernel
On Mon, Feb 21, 2005 at 02:21:50PM +0100, Piotr Kowalczyk wrote:
> Hi all,
>
> I'm suffering from destination cache overflow on router running kernel
> 2.6.10. This wouldn't be anything special if not different numbers
> reported by slabinfo and the real state. It's worth to mention that
> there was no problems with old 2.4.x here.
Use 2.6.11-rc4 -- this problem has been fixed there.
Phil
^ permalink raw reply [flat|nested] 2+ messages in thread
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