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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-10-28 16:40:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-10-29 08:17:07 +0200 |
| commit | 5c1eb08936693cd78c71164c8bea0b086ae72c67 (patch) | |
| tree | c574c0702264acba1a695148dae27cf189287acc /arch | |
| parent | 419db274bed4269f475a8e78cbe9c917192cfe8b (diff) | |
| download | linux-5c1eb08936693cd78c71164c8bea0b086ae72c67.tar.gz linux-5c1eb08936693cd78c71164c8bea0b086ae72c67.tar.bz2 linux-5c1eb08936693cd78c71164c8bea0b086ae72c67.zip | |
x86-32: Restore irq stacks NUMA-aware allocations
Commit 22d4cd4c4d ("Allocate irq stacks seperate from percpu
area") removed NUMA affinity of IRQ stacks as side-effect of
the fix.
Using alloc_pages_node() instead of __get_free_pages() is safe,
even if the target node has no available LOWMEM pages :
alloc_pages_node() fallbacks to another node.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Brian Gerst <brgerst@gmail.com>
Cc: tj@kernel.org
Cc: torvalds@linux-foundation.org
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1288276854.2649.607.camel@edumazet-laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/irq_32.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index 64668dbf00a4..96656f207751 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -17,6 +17,7 @@ #include <linux/delay.h> #include <linux/uaccess.h> #include <linux/percpu.h> +#include <linux/mm.h> #include <asm/apic.h> @@ -125,7 +126,9 @@ void __cpuinit irq_ctx_init(int cpu) if (per_cpu(hardirq_ctx, cpu)) return; - irqctx = (union irq_ctx *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER); + irqctx = page_address(alloc_pages_node(cpu_to_node(cpu), + THREAD_FLAGS, + THREAD_ORDER)); irqctx->tinfo.task = NULL; irqctx->tinfo.exec_domain = NULL; irqctx->tinfo.cpu = cpu; @@ -134,7 +137,9 @@ void __cpuinit irq_ctx_init(int cpu) per_cpu(hardirq_ctx, cpu) = irqctx; - irqctx = (union irq_ctx *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER); + irqctx = page_address(alloc_pages_node(cpu_to_node(cpu), + THREAD_FLAGS, + THREAD_ORDER)); irqctx->tinfo.task = NULL; irqctx->tinfo.exec_domain = NULL; irqctx->tinfo.cpu = cpu; |