search for: ip_dst_cach

...etwork is un-responsive. All IP forwarding stops and the server cannot be reached from any network interfaces. After diagnosing the issue, it appears that there is a rt_cache leak in the kernel. At 5 minute intervals I collect the following two values: `/sbin/ip -o route ls cache | wc -l` `grep ip_dst_cache /proc/slabinfo | awk -F' ' '{ print $2; }'` The first value represents the number of cached routes in the network stack. The second value represents the number of cached route objects the kernel has allocated. After collecting the data for 8 hours, I have seen the cached routes...

...From what I gather this error means that the routing cache filled up. The maximum size of the routing cache can be set by changing /proc/sys/net/ipv4/route/max_size. The default on my mandrake install is 32768. The current size of the routing cache can apparently be determined by "grep ip_dst_cache /proc/slabinfo". On my router this value is slowly, but constantly, trending upwards at all times. However, if I list the cache with "route -Cn", or "cat /proc/net/rt_cache", I see significantly fewer entries than what slabinfo reports. Two things have changed since...

...156 37% 0.06K 7 59 28K fs_cache 404 44 10% 0.02K 2 202 8K biovec-1 390 293 75% 0.12K 13 30 52K bio 327 327 100% 4.00K 327 1 1308K size-4096 320 190 59% 0.38K 32 10 128K ip_dst_cache 308 227 73% 0.50K 44 7 176K skbuff_fclone_cache 258 247 95% 0.62K 43 6 172K sock_inode_cache 254 254 100% 1.84K 127 2 508K task_struct 252 225 89% 0.81K 28 9 224K signal_cache 240 203 8...

...UNIX 377 399 512 7 1 ip_mrt_cache 0 0 128 30 1 tcp_bind_bucket 14 203 16 203 1 inet_peer_cache 81 118 64 59 1 secpath_cache 0 0 128 30 1 xfrm_dst_cache 0 0 384 10 1 ip_dst_cache 176 240 256 15 1 arp_cache 6 30 256 15 1 RAW 3 7 512 7 1 UDP 29 42 512 7 1 tw_sock_TCP 0 0 128 30 1 request_sock_TCP 0 0 64 59 1 TCP...

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

...413 156 37% 0.06K 7 59 28K fs_cache 404 44 10% 0.02K 2 202 8K biovec-1 390 293 75% 0.12K 13 30 52K bio 327 327 100% 4.00K 327 1 1308K size-4096 320 190 59% 0.38K 32 10 128K ip_dst_cache 308 227 73% 0.50K 44 7 176K skbuff_fclone_cache 258 247 95% 0.62K 43 6 172K sock_inode_cache 254 254 100% 1.84K 127 2 508K task_struct 252 225 89% 0.81K 28 9 224K signal_cache 240 203 84%...

I have just completed the installation of a new firewall running Shorewall 1.4 on Mandrake 9.2 for our campus network. It appears to be running fairly well so far, but is generating significantly more log entries than our previous linux 2.0.x firewall... Our previous firewall enjoyed more than 6 years of 24/7 operation with no downtime before we finally decided it needed more horsepower, and

...122 64 61 1 : tunables 120 60 8 : slabdata 2 2 0 ip_fib_alias 16 226 16 226 1 : tunables 120 60 8 : slabdata 1 1 0 ip_fib_hash 16 119 32 119 1 : tunables 120 60 8 : slabdata 1 1 0 ip_dst_cache 451 720 256 15 1 : tunables 120 60 8 : slabdata 48 48 0 arp_cache 11 30 256 15 1 : tunables 120 60 8 : slabdata 2 2 0 RAW 3 7 512 7 1 : tunables 54 27 8 : slabdata 1...

...42 50 384 10 ip_mrt_cache 0 0 128 30 tcp_bind_bucket 49 203 16 203 inet_peer_cache 1 59 64 59 secpath_cache 0 0 128 30 xfrm_dst_cache 0 0 320 12 ip_dst_cache 15 30 256 15 arp_cache 7 30 128 30 RAW 2 9 448 9 UDP 5 9 448 9 tw_sock_TCP 3 30 128 30 request_sock_TCP 0 0 64...

Hi Guys, My users are reporting some issues with memory on our lustre 1.8.1 clients. It looks like when they submit a single job at a time the run time was about 4.5 minutes. However, when they ran multiple jobs (10 or less) on a client with 192GB of memory on a single node the run time for each job was exceeding 3-4X the run time for the single process. They also noticed that the swap space