Ivan Vladimirov wrote:
Frédéric Massot wrote:
Hi,
I regularly have errors (kernel: dst cache overflow) and crash of a
firewall under Linux 2.6.17 and the route patch from Julian Anastasov.
With rtstat I see that the route cache size increases regularly without
never decreasing.
I have this parameters:
fw:/proc/sys/net/ipv4/route# grep . *
error_burst:1250
error_cost:250
gc_elasticity:15
gc_interval:60
gc_min_interval:0
gc_min_interval_ms:500
gc_thresh:4096
gc_timeout:300
max_delay:10
max_size:65536
min_adv_mss:256
min_delay:2
min_pmtu:552
mtu_expires:600
redirect_load:5
redirect_number:9
redirect_silence:5120
secret_interval:600
I can increase the maximum size of the cache, but that will do nothing
but delay the crash.
Can you help me?
Regards.
max_size=65536
is to low increase size to 256k
Hi,
I supervised the system during a few weeks with slabtop and rtstat.
What I could see, it is that the ip_dst_cache cache grow without never
being cleaned by the garbage collector.
At the end of a few days, the traffic is slowed down and the customer
restart the firewall. When the cache reaches its maximum value there is
the error message (kernel: dst cache overflow) and the traffic is really
disturbed.
I use the Linux kernel 2.6.17 and the route patch from Julian Anastasov.
- The bug comes from the kernel or the patch?
- Do you know if this bug were corrected in the new versions of the kernel?
Regards.
--
==============================================
| FRÉDÉRIC MASSOT |
| http://www.juliana-multimedia.com |
| mailto:frederic@juliana-multimedia.com |
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