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| author | Dave Hansen <dave@sr71.net> | 2014-01-23 15:52:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-23 16:36:50 -0800 |
| commit | f0b791a34cb3cffd2bbc3ca4365c9b719fa2c9f3 (patch) | |
| tree | c4aa42cd8ecd15eca056a944788f5457e3a370ef /mm/memory_hotplug.c | |
| parent | 12ab028be0008640de712ca890dc1a9ae224934d (diff) | |
| download | op-kernel-dev-f0b791a34cb3cffd2bbc3ca4365c9b719fa2c9f3.zip op-kernel-dev-f0b791a34cb3cffd2bbc3ca4365c9b719fa2c9f3.tar.gz | |
mm: print more details for bad_page()
bad_page() is cool in that it prints out a bunch of data about the page.
But, I can never remember which page flags are good and which are bad,
or whether ->index or ->mapping is required to be NULL.
This patch allows bad/dump_page() callers to specify a string about why
they are dumping the page and adds explanation strings to a number of
places. It also adds a 'bad_flags' argument to bad_page(), which it
then dumps out separately from the flags which are actually set.
This way, the messages will show specifically why the page was bad,
*specifically* which flags it is complaining about, if it was a page
flag combination which was the problem.
[akpm@linux-foundation.org: switch to pr_alert]
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index cc2ab37..a512a47 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1309,7 +1309,7 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn) #ifdef CONFIG_DEBUG_VM printk(KERN_ALERT "removing pfn %lx from LRU failed\n", pfn); - dump_page(page); + dump_page(page, "failed to remove from LRU"); #endif put_page(page); /* Because we don't have big zone->lock. we should |
