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authorLinus Torvalds <torvalds@linux-foundation.org>2013-06-10 13:27:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-06-10 13:27:46 -0700
commit50e6f8511a6b6a61611dae36794b5400cdc80ea1 (patch)
tree07a73ce25a630f4a749215d0068612e0425e09e3 /arch
parent30f5f739266dc83c5512c0b496a1e93651668baa (diff)
parentb2c75c446ae72387916e2caf6e6dca815b6e5e6e (diff)
downloadvexpress-lsk-50e6f8511a6b6a61611dae36794b5400cdc80ea1.tar.gz
Merge tag 'stable/for-linus-3.10-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
Pull xen fixes from Konrad Rzeszutek Wilk: "Two bug-fixes for regressions: - xen/tmem stopped working after a certain combination of modprobe/swapon was used - cpu online/offlining would trigger WARN_ON." * tag 'stable/for-linus-3.10-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/tmem: Don't over-write tmem_frontswap_poolid after tmem_frontswap_init set it. xen/smp: Fixup NOHZ per cpu data when onlining an offline CPU.
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/xen/smp.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index fb44426fe93..d99cae8147d 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -17,6 +17,7 @@
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/irq_work.h>
+#include <linux/tick.h>
#include <asm/paravirt.h>
#include <asm/desc.h>
@@ -447,6 +448,13 @@ static void __cpuinit xen_play_dead(void) /* used only with HOTPLUG_CPU */
play_dead_common();
HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
cpu_bringup();
+ /*
+ * commit 4b0c0f294 (tick: Cleanup NOHZ per cpu data on cpu down)
+ * clears certain data that the cpu_idle loop (which called us
+ * and that we return from) expects. The only way to get that
+ * data back is to call:
+ */
+ tick_nohz_idle_enter();
}
#else /* !CONFIG_HOTPLUG_CPU */