[PATCH v2 8/9] mm, page_alloc: print symbolic gfp_flags on allocation failure

Vlastimil Babka
2015-11-24T12:39:42Z

It would be useful to translate gfp_flags into string representation when
printing in case of an allocation failure, especially as the flags have been
undergoing some changes recently and the script ./scripts/gfp-translate needs
a matching source version to be accurate.

Example output:

stapio: page allocation failure: order:9, mode:0x2080020(GFP_ATOMIC)

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
mm/page_alloc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f806a1a..80349ac 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2711,9 +2711,9 @@ void warn_alloc_failed(gfp_t gfp_mask, unsigned int order, const char *fmt, ...)
va_end(args);
}

- pr_warn("%s: page allocation failure: order:%u, mode:0x%x\n",
+ pr_warn("%s: page allocation failure: order:%u, mode:0x%x",
current->comm, order, gfp_mask);
-
+ dump_gfpflag_names(gfp_mask);
dump_stack();
if (!should_suppress_show_mem())
show_mem(filter);
--
2.6.3