Re: "dst cache overflow" messages and crash
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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@xxxxxxxxxxxxxxxxxxxxxx | ===========================Debian=GNU/Linux=== _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc