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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-06-10 13:27:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-06-10 13:27:46 -0700 |
| commit | 50e6f8511a6b6a61611dae36794b5400cdc80ea1 (patch) | |
| tree | 07a73ce25a630f4a749215d0068612e0425e09e3 /arch | |
| parent | 30f5f739266dc83c5512c0b496a1e93651668baa (diff) | |
| parent | b2c75c446ae72387916e2caf6e6dca815b6e5e6e (diff) | |
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.c | 8 |
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 */ |