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Drivers: hv: balloon: don't wait for ol_waitevent when memhp_auto_online is enabled

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With the recently introduced in-kernel memory onlining
(MEMORY_HOTPLUG_DEFAULT_ONLINE) these is no point in waiting for pages
to come online in the driver and we can get rid of the waiting.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vitaly Kuznetsov 2016-08-24 16:23:11 -07:00 committed by Greg Kroah-Hartman
parent cb7a5724c7
commit a132c54cbc
1 changed files with 9 additions and 6 deletions
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15
drivers/hv/hv_balloon.c
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@ -673,7 +673,7 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
has->covered_end_pfn += processed_pfn; has->covered_end_pfn += processed_pfn;
init_completion(&dm_device.ol_waitevent); init_completion(&dm_device.ol_waitevent);
dm_device.ha_waiting = true; dm_device.ha_waiting = !memhp_auto_online;
mutex_unlock(&dm_device.ha_region_mutex); mutex_unlock(&dm_device.ha_region_mutex);
nid = memory_add_physaddr_to_nid(PFN_PHYS(start_pfn)); nid = memory_add_physaddr_to_nid(PFN_PHYS(start_pfn));
@ -699,12 +699,15 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
} }
/* /*
* Wait for the memory block to be onlined. * Wait for the memory block to be onlined when memory onlining
* Since the hot add has succeeded, it is ok to * is done outside of kernel (memhp_auto_online). Since the hot
* proceed even if the pages in the hot added region * add has succeeded, it is ok to proceed even if the pages in
* have not been "onlined" within the allowed time. * the hot added region have not been "onlined" within the
* allowed time.
*/ */
wait_for_completion_timeout(&dm_device.ol_waitevent, 5*HZ); if (dm_device.ha_waiting)
wait_for_completion_timeout(&dm_device.ol_waitevent,
5*HZ);
mutex_lock(&dm_device.ha_region_mutex); mutex_lock(&dm_device.ha_region_mutex);
post_status(&dm_device); post_status(&dm_device);
} }