From 7b78d335ac15b10bbcb0397c635d7f0d569b0270 Mon Sep 17 00:00:00 2001 From: Yasunori Goto Date: Sun, 21 Oct 2007 16:41:36 -0700 Subject: memory hotplug: rearrange memory hotplug notifier Current memory notifier has some defects yet. (Fortunately, nothing uses it.) This patch is to fix and rearrange for them. - Add information of start_pfn, nr_pages, and node id if node status is changes from/to memoryless node for callback functions. Callbacks can't do anything without those information. - Add notification going-online status. It is necessary for creating per node structure before the node's pages are available. - Move GOING_OFFLINE status notification after page isolation. It is good place for return memory like cache for callback, because returned page is not used again. - Make CANCEL events for rollingback when error occurs. - Delete MEM_MAPPING_INVALID notification. It will be not used. - Fix compile error of (un)register_memory_notifier(). Signed-off-by: Yasunori Goto Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/base/memory.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) (limited to 'drivers/base/memory.c') diff --git a/drivers/base/memory.c b/drivers/base/memory.c index c41d072..7868707 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -137,7 +137,7 @@ static ssize_t show_mem_state(struct sys_device *dev, char *buf) return len; } -static inline int memory_notify(unsigned long val, void *v) +int memory_notify(unsigned long val, void *v) { return blocking_notifier_call_chain(&memory_chain, val, v); } @@ -183,7 +183,6 @@ memory_block_action(struct memory_block *mem, unsigned long action) break; case MEM_OFFLINE: mem->state = MEM_GOING_OFFLINE; - memory_notify(MEM_GOING_OFFLINE, NULL); start_paddr = page_to_pfn(first_page) << PAGE_SHIFT; ret = remove_memory(start_paddr, PAGES_PER_SECTION << PAGE_SHIFT); @@ -191,7 +190,6 @@ memory_block_action(struct memory_block *mem, unsigned long action) mem->state = old_state; break; } - memory_notify(MEM_MAPPING_INVALID, NULL); break; default: printk(KERN_WARNING "%s(%p, %ld) unknown action: %ld\n", @@ -199,11 +197,6 @@ memory_block_action(struct memory_block *mem, unsigned long action) WARN_ON(1); ret = -EINVAL; } - /* - * For now, only notify on successful memory operations - */ - if (!ret) - memory_notify(action, NULL); return ret; } -- cgit v1.1