diff options
| author | Dave Hansen <dave@sr71.net> | 2014-01-24 03:52:49 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-24 04:36:50 +0400 |
| commit | f0b791a34cb3cffd2bbc3ca4365c9b719fa2c9f3 (patch) | |
| tree | c4aa42cd8ecd15eca056a944788f5457e3a370ef /mm/balloon_compaction.c | |
| parent | 12ab028be0008640de712ca890dc1a9ae224934d (diff) | |
| download | linux-f0b791a34cb3cffd2bbc3ca4365c9b719fa2c9f3.tar.xz | |
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/balloon_compaction.c')
| -rw-r--r-- | mm/balloon_compaction.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/balloon_compaction.c b/mm/balloon_compaction.c index 07dbc8ec46cf..6e45a5074bf0 100644 --- a/mm/balloon_compaction.c +++ b/mm/balloon_compaction.c @@ -267,7 +267,7 @@ void balloon_page_putback(struct page *page) put_page(page); } else { WARN_ON(1); - dump_page(page); + dump_page(page, "not movable balloon page"); } unlock_page(page); } @@ -287,7 +287,7 @@ int balloon_page_migrate(struct page *newpage, BUG_ON(!trylock_page(newpage)); if (WARN_ON(!__is_movable_balloon_page(page))) { - dump_page(page); + dump_page(page, "not movable balloon page"); unlock_page(newpage); return rc; } |