Paul E. McKenney 98f180837a
mm: Make mem_dump_obj() handle vmalloc() memory ...
This commit adds vmalloc() support to mem_dump_obj(). Note that the
vmalloc_dump_obj() function combines the checking and dumping, in
contrast with the split between kmem_valid_obj() and kmem_dump_obj().
The reason for the difference is that the checking in the vmalloc()
case involves acquiring a global lock, and redundant acquisitions of
global locks should be avoided, even on not-so-fast paths.
Note that this change causes on-stack variables to be reported as
vmalloc() storage from kernel_clone() or similar, depending on the degree
of inlining that your compiler does. This is likely more helpful than
the earlier "non-paged (local) memory".
Cc: Andrew Morton <akpm@linux-foundation.org >
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com >
Cc: <linux-mm@kvack.org >
Reported-by: Andrii Nakryiko <andrii@kernel.org >
Acked-by: Vlastimil Babka <vbabka@suse.cz >
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org >
Signed-off-by: Paul E. McKenney <paulmck@kernel.org >
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