Ravikiran G Thirumalai a écrit :
Patch uses a static PDA array early at boot and reallocates processor PDA
with node local memory when kmalloc is ready, just before pda_init.
The boot_cpu_pda is needed since the cpu_pda is used even before pda_init for
that cpu is called.
(pda_init is called when APs are brought on at rest_init(). But
setup_per_cpu_areas is called early in start_kernel and
sched_init uses the per-cpu offset table early)
That seems good, thank you !
Do you have an idea of the performance gain we could expect from this node
local pda allocation ?
Say a CPU is on Node 1, was a change in pda (allocated on Node 0) immediatly
mirrored on remote node or not ?
Eric
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