From: Nathan Lynch <nathanl@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 2/3] powerpc/rtas: allow rescheduling while changing cpu states
Date: Fri, 2 Aug 2019 14:29:25 -0500 [thread overview]
Message-ID: <20190802192926.19277-3-nathanl@linux.ibm.com> (raw)
In-Reply-To: <20190802192926.19277-1-nathanl@linux.ibm.com>
rtas_cpu_state_change_mask() potentially operates on scores of cpus,
so explicitly allow rescheduling in the loop body.
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
---
arch/powerpc/kernel/rtas.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 05824eb4323b..b7ca2fde68a9 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -16,6 +16,7 @@
#include <linux/capability.h>
#include <linux/delay.h>
#include <linux/cpu.h>
+#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/completion.h>
#include <linux/cpumask.h>
@@ -898,6 +899,7 @@ static int rtas_cpu_state_change_mask(enum rtas_cpu_state state,
cpumask_clear_cpu(cpu, cpus);
}
}
+ cond_resched();
}
return ret;
--
2.20.1
next prev parent reply other threads:[~2019-08-02 19:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-02 19:29 [PATCH v2 0/3] more migration vs CPU hotplug fixes etc Nathan Lynch
2019-08-02 19:29 ` [PATCH v2 1/3] powerpc/rtas: use device model APIs and serialization during LPM Nathan Lynch
2019-08-05 23:05 ` Tyrel Datwyler
2019-08-12 16:55 ` Nathan Lynch
2019-08-13 17:20 ` Gautham R Shenoy
2019-08-22 13:08 ` Michael Ellerman
2019-08-02 19:29 ` Nathan Lynch [this message]
2019-08-13 17:17 ` [PATCH v2 2/3] powerpc/rtas: allow rescheduling while changing cpu states Gautham R Shenoy
2019-08-13 18:14 ` Nathan Lynch
2019-08-02 19:29 ` [PATCH v2 3/3] powerpc/pseries/mobility: use cond_resched when updating device tree Nathan Lynch
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