mm/vmap: add DEBUG_AUGMENT_PROPAGATE_CHECK macro
authorUladzislau Rezki (Sony) <urezki@gmail.com>
Fri, 17 May 2019 21:31:34 +0000 (14:31 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 18 May 2019 22:52:26 +0000 (15:52 -0700)
commitbb850f4dae4abb18c5ee727bb2d6df9ca47ede49
treeeb7f503bd8ff66de51cb5df02c9040724a8ef04a
parent68ad4a3304335358f95a417f2a2b0c909e5119c4
mm/vmap: add DEBUG_AUGMENT_PROPAGATE_CHECK macro

This macro adds some debug code to check that the augment tree is
maintained correctly, meaning that every node contains valid
subtree_max_size value.

By default this option is set to 0 and not active.  It requires
recompilation of the kernel to activate it.  Set to 1, compile the
kernel.

[urezki@gmail.com: v4]
Link: http://lkml.kernel.org/r/20190406183508.25273-3-urezki@gmail.com
Link: http://lkml.kernel.org/r/20190402162531.10888-3-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Roman Gushchin <guro@fb.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Garnier <thgarnie@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/vmalloc.c