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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>
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@ -17,6 +17,7 @@
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#include <linux/delay.h>
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#include <linux/uaccess.h>
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#include <linux/percpu.h>
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#include <linux/mm.h>
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#include <asm/apic.h>
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@ -125,7 +126,9 @@ void __cpuinit irq_ctx_init(int cpu)
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if (per_cpu(hardirq_ctx, cpu))
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return;
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irqctx = (union irq_ctx *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER);
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irqctx = page_address(alloc_pages_node(cpu_to_node(cpu),
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THREAD_FLAGS,
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THREAD_ORDER));
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irqctx->tinfo.task = NULL;
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irqctx->tinfo.exec_domain = NULL;
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irqctx->tinfo.cpu = cpu;
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@ -134,7 +137,9 @@ void __cpuinit irq_ctx_init(int cpu)
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per_cpu(hardirq_ctx, cpu) = irqctx;
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irqctx = (union irq_ctx *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER);
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irqctx = page_address(alloc_pages_node(cpu_to_node(cpu),
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THREAD_FLAGS,
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THREAD_ORDER));
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irqctx->tinfo.task = NULL;
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irqctx->tinfo.exec_domain = NULL;
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irqctx->tinfo.cpu = cpu;
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