Re: [patch] Additions to .data.read_mostly section

[Eric Dumazet]

Ravikiran G Thirumalai a écrit :
> Following patch moves a few static 'read mostly' variables to the 
> .data.read_mostly section.  Typically these are vector - irq tables,
> boot_cpu_data, node_maps etc., which are initialized once and read from 
> often and rarely written to.  Please include.

Good candidates for read_mostly are all the 'kmem_cache_t *xxx_cache'

slab was carefuly designed to eliminate cache line ping pongs on SMP, but if 
the initial pointer to slab sits in a heavily modified cache line, we loose.

Eric
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