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neigh: document gc_thresh2
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Missing documentation for gc_thresh2 sysctl.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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stephen hemminger authored and David S. Miller committed Aug 26, 2014
1 parent f79918a commit a3d1214
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6 changes: 6 additions & 0 deletions Documentation/networking/ip-sysctl.txt
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Expand Up @@ -65,6 +65,12 @@ neigh/default/gc_thresh1 - INTEGER
purge entries if there are fewer than this number.
Default: 128

neigh/default/gc_thresh2 - INTEGER
Threshold when garbage collector becomes more aggressive about
purging entries. Entries older than 5 seconds will be cleared
when over this number.
Default: 512

neigh/default/gc_thresh3 - INTEGER
Maximum number of neighbor entries allowed. Increase this
when using large numbers of interfaces and when communicating
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