43 lines
1.1 KiB
Diff
43 lines
1.1 KiB
Diff
Subject: slub: Enable irqs for __GFP_WAIT
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Wed, 09 Jan 2013 12:08:15 +0100
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.1-rt3.tar.xz
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SYSTEM_RUNNING might be too late for enabling interrupts. Allocations
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with GFP_WAIT can happen before that. So use this as an indicator.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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mm/slub.c | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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--- a/mm/slub.c
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+++ b/mm/slub.c
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@@ -1570,10 +1570,17 @@ static struct page *allocate_slab(struct
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void *start, *p;
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int idx, order;
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bool shuffle;
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+ bool enableirqs = false;
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flags &= gfp_allowed_mask;
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if (gfpflags_allow_blocking(flags))
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+ enableirqs = true;
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+#ifdef CONFIG_PREEMPT_RT_FULL
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+ if (system_state > SYSTEM_BOOTING)
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+ enableirqs = true;
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+#endif
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+ if (enableirqs)
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local_irq_enable();
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flags |= s->allocflags;
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@@ -1632,7 +1639,7 @@ static struct page *allocate_slab(struct
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page->frozen = 1;
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out:
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- if (gfpflags_allow_blocking(flags))
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+ if (enableirqs)
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local_irq_disable();
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if (!page)
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return NULL;
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