2020-06-23 13:42:59 +00:00
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From cdb48077b31503604eace5c253d95af45d57fb7f Mon Sep 17 00:00:00 2001
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Message-Id: <cdb48077b31503604eace5c253d95af45d57fb7f.1592846147.git.zanussi@kernel.org>
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In-Reply-To: <07cd0dbc80b976663c80755496a03f288decfe5a.1592846146.git.zanussi@kernel.org>
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References: <07cd0dbc80b976663c80755496a03f288decfe5a.1592846146.git.zanussi@kernel.org>
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2018-08-27 14:32:32 +00:00
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From: Thomas Gleixner <tglx@linutronix.de>
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2019-04-08 23:49:20 +00:00
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Date: Wed, 9 Jan 2013 12:08:15 +0100
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2020-06-23 13:42:59 +00:00
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Subject: [PATCH 082/330] slub: Enable irqs for __GFP_WAIT
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.127-rt55.tar.xz
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2018-08-27 14:32:32 +00:00
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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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2019-04-08 23:49:20 +00:00
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mm/slub.c | 9 ++++++++-
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2018-08-27 14:32:32 +00:00
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1 file changed, 8 insertions(+), 1 deletion(-)
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2019-04-08 23:49:20 +00:00
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diff --git a/mm/slub.c b/mm/slub.c
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2020-06-22 13:14:16 +00:00
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index f3fcb9502093..d243c6ef7fc9 100644
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2018-08-27 14:32:32 +00:00
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--- a/mm/slub.c
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+++ b/mm/slub.c
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2019-04-08 23:49:20 +00:00
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@@ -1570,10 +1570,17 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
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2018-08-27 14:32:32 +00:00
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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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2019-04-08 23:49:20 +00:00
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@@ -1632,7 +1639,7 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
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2018-08-27 14:32:32 +00:00
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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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2020-01-03 23:36:11 +00:00
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--
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2020-06-22 13:14:16 +00:00
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2.17.1
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2020-01-03 23:36:11 +00:00
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