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authorKirill Korotaev <dev@sw.ru>2006-11-08 08:12:01 +0100
committerAdrian Bunk <bunk@stusta.de>2006-11-08 08:12:01 +0100
commita38c4343dc64fa5da5989d72c3dec9b5ed521f3b (patch)
treeeb5664103485c058dd118e8b3a85fbc4e66ff2f3 /net
parent5db60db61aaa613f8c6dffa4213797c0dd83a8fd (diff)
[IPV4]: Limit rt cache size properly.
During OpenVZ stress testing we found that UDP traffic with random src can generate too much excessive rt hash growing leading finally to OOM and kernel panics. It was found that for 4GB i686 system (having 1048576 total pages and 225280 normal zone pages) kernel allocates the following route hash: syslog: IP route cache hash table entries: 262144 (order: 8, 1048576 bytes) => ip_rt_max_size = 4194304 entries, i.e. max rt size is 4194304 * 256b = 1Gb of RAM > normal_zone Attached the patch which removes HASH_HIGHMEM flag from alloc_large_system_hash() call. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Adrian Bunk <bunk@stusta.de>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/route.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a67955e26371..c2cd901327bd 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -3153,7 +3153,7 @@ int __init ip_rt_init(void)
rhash_entries,
(num_physpages >= 128 * 1024) ?
15 : 17,
- HASH_HIGHMEM,
+ 0,
&rt_hash_log,
&rt_hash_mask,
0);