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ehea: Fix memory hotplug support

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This patch implements the memory notifier to update the busmap
instantly instead of rebuilding the whole map. This is necessary
because walk_memory_resource provides different information than
required during memory hotplug.

Signed-off-by: Hannes Hering <hering2@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Hannes Hering
2008-10-16 11:36:42 +02:00
committed by Jeff Garzik
parent 93fbaae188
commit d4f12daf7b
4 changed files with 122 additions and 44 deletions
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25
drivers/net/ehea/ehea_main.c
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@@ -2863,7 +2863,7 @@ static void ehea_rereg_mrs(struct work_struct *work)
struct ehea_adapter *adapter;
mutex_lock(&dlpar_mem_lock);
ehea_info("LPAR memory enlarged - re-initializing driver");
ehea_info("LPAR memory changed - re-initializing driver");
list_for_each_entry(adapter, &adapter_list, list)
if (adapter->active_ports) {
@@ -2900,13 +2900,6 @@ static void ehea_rereg_mrs(struct work_struct *work)
}
}
ehea_destroy_busmap();
ret = ehea_create_busmap();
if (ret) {
ehea_error("creating ehea busmap failed");
goto out;
}
clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
list_for_each_entry(adapter, &adapter_list, list)
@@ -3519,9 +3512,21 @@ void ehea_crash_handler(void)
static int ehea_mem_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct memory_notify *arg = data;
switch (action) {
case MEM_OFFLINE:
ehea_info("memory has been removed");
case MEM_CANCEL_OFFLINE:
ehea_info("memory offlining canceled");
/* Readd canceled memory block */
case MEM_ONLINE:
ehea_info("memory is going online");
if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
return NOTIFY_BAD;
ehea_rereg_mrs(NULL);
break;
case MEM_GOING_OFFLINE:
ehea_info("memory is going offline");
if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
return NOTIFY_BAD;
ehea_rereg_mrs(NULL);
break;
default: