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(parent: 492c2e4) | patch
x86: resize NR_IRQS for large machines
authorAlan Mayer <ajm@sgi.com>
Wed, 26 Mar 2008 21:11:31 +0000 (16:11 -0500)
committerIngo Molnar <mingo@elte.hu>
Mon, 12 May 2008 19:28:05 +0000 (21:28 +0200)
commit6859a8402945cf1d74af75a2e1aa4e327a506ab4
treefd663e47f31a8c30718af560132e1e58940c475ftree | snapshot
parent492c2e476eac010962850006c49df326919b284ccommit | diff
x86: resize NR_IRQS for large machines

On machines with very large numbers of cpus, tables that are dimensioned
by NR_IRQS get very large, especially the irq_desc table.  They are also
very sparsely used.  When the cpu count is > MAX_IO_APICS, use MAX_IO_APICS
to set NR_IRQS, otherwise use NR_CPUS.

Signed-off-by: Alan Mayer <ajm@sgi.com>
Reviewed-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
include/asm-x86/irq_64.h diff | blob | history
include/linux/kernel_stat.h diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git