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| author | Jiang Liu <jiang.liu@linux.intel.com> | 2015-05-07 10:53:56 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-05-13 09:50:24 +0200 |
| commit | 486ca539caa082c7f2929c207af1b3ce2a304489 (patch) | |
| tree | 89154d5629e51501faaec14c3141f4039b6bb52e /arch/x86/kernel/irq.c | |
| parent | 4a00c95dcdba45c9592af2e908c0816fd54f5544 (diff) | |
| download | linux-next-486ca539caa082c7f2929c207af1b3ce2a304489.tar.gz | |
x86, irq: Allocate CPU vectors from device local CPUs if possible
On NUMA systems, an IO device may be associated with a NUMA node.
It may improve IO performance to allocate resources, such as memory
and interrupts, from device local node.
This patch introduces a mechanism to support CPU vector allocation
policies. It tries to allocate CPU vectors from CPUs on device local
node first, and then fallback to all online(global) CPUs.
This mechanism may be used to support NumaConnect systems to allocate
CPU vectors from device local node.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Tested-by: Daniel J Blueman <daniel@numascale.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Link: http://lkml.kernel.org/r/1430967244-28905-1-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/irq.c')
0 files changed, 0 insertions, 0 deletions