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| author | Geoff Levand <geoffrey.levand@am.sony.com> | 2008-05-14 16:05:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-14 19:11:14 -0700 |
| commit | fd8a4221ad76df700ff34875c9fbc42302aa4ba3 (patch) | |
| tree | 4f37586cef40dca7cc8b630e85965a698e3aa1be | |
| parent | 3fc957721d18c93662f7d4dab455b80f53dd2641 (diff) | |
| download | lwn-fd8a4221ad76df700ff34875c9fbc42302aa4ba3.tar.gz lwn-fd8a4221ad76df700ff34875c9fbc42302aa4ba3.zip | |
memory_hotplug: check for walk_memory_resource() failure in online_pages()
Add a check to online_pages() to test for failure of
walk_memory_resource(). This fixes a condition where a failure
of walk_memory_resource() can lead to online_pages() returning
success without the requested pages being onlined.
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Keith Mannthey <kmannth@us.ibm.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/memory_hotplug.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 988bd91b9f7f..656ad1c65422 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -404,8 +404,15 @@ int online_pages(unsigned long pfn, unsigned long nr_pages) if (!populated_zone(zone)) need_zonelists_rebuild = 1; - walk_memory_resource(pfn, nr_pages, &onlined_pages, + ret = walk_memory_resource(pfn, nr_pages, &onlined_pages, online_pages_range); + if (ret) { + printk(KERN_DEBUG "online_pages %lx at %lx failed\n", + nr_pages, pfn); + memory_notify(MEM_CANCEL_ONLINE, &arg); + return ret; + } + zone->present_pages += onlined_pages; zone->zone_pgdat->node_present_pages += onlined_pages; |