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x86-32: Restore irq stacks NUMA-aware allocations

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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>
This commit is contained in:
Eric Dumazet 2010-10-28 16:40:54 +02:00 committed by Ingo Molnar
parent 419db274be
commit 5c1eb08936
1 changed files with 7 additions and 2 deletions
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9
arch/x86/kernel/irq_32.c
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@ -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;