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authorEric Dumazet <>2009-01-06 14:41:04 -0800
committerLinus Torvalds <>2009-01-06 15:59:13 -0800
commit179f7ebff6be45738c6e2fa68c8d2cc5c2c6308e (patch)
tree3d48b5f825cfa29f5b39656503c5157872454e9f /.mailmap
parente3d5a27d5862b6425d0879272e24abecf7245105 (diff)
percpu_counter: FBC_BATCH should be a variable
For NR_CPUS >= 16 values, FBC_BATCH is 2*NR_CPUS Considering more and more distros are using high NR_CPUS values, it makes sense to use a more sensible value for FBC_BATCH, and get rid of NR_CPUS. A sensible value is 2*num_online_cpus(), with a minimum value of 32 (This minimum value helps branch prediction in __percpu_counter_add()) We already have a hotcpu notifier, so we can adjust FBC_BATCH dynamically. We rename FBC_BATCH to percpu_counter_batch since its not a constant anymore. Signed-off-by: Eric Dumazet <> Acked-by: David S. Miller <> Acked-by: Peter Zijlstra <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
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