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Allocate a kmem cache magazine for every possible CPU which might be added to the system. This ensures that when one of these CPUs is enabled it can be safely used immediately. For many systems the number of online CPUs is identical to the number of present CPUs so this does imply an increased memory footprint. In fact, dynamically allocating the array of magazine pointers instead of using the worst case NR_CPUS can end up decreasing our memory footprint. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ned Bass <bass6@llnl.gov> Closes #482 |
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