| commit | 0fa0ebbf15addc1be8f73325d809c8547a9de304 | [log] [tgz] |
|---|---|---|
| author | Mike Travis <travis@sgi.com> | Sat Jan 10 22:24:06 2009 -0800 |
| committer | Ingo Molnar <mingo@elte.hu> | Sun Jan 11 19:13:35 2009 +0100 |
| tree | cd995419a3eb84d3e18e92ff205af86a7a4ed66d | |
| parent | e2f4d06545ec1f29b0e838ee34cbf3500ea5b9a4 [diff] |
irq: allocate irq_desc_ptrs array based on nr_irqs
Impact: allocate irq_desc_ptrs in preparation for making it variable-sized.
This addresses this memory usage bump when NR_CPUS bumped from 128 to 4096:
34816 +229376 264192 +658% irq_desc_ptrs(.data.read_mostly)
The patch is split into two parts, the first simply allocates the
irq_desc_ptrs array. Then next will deal with making it variable.
This is only when CONFIG_SPARSE_IRQS=y.
Signed-off-by: Mike Travis <travis@sgi.com>