Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 6df5ee78 authored by Matthew Wilcox's avatar Matthew Wilcox Committed by Linus Torvalds
Browse files

radix tree test suite: free preallocated nodes 

It can be a source of mild concern when the test suite shows that we're
leaking nodes.  While poring over the source code looking for leaks can
lead to some fascinating bugs being discovered, sometimes the leak is
simply that these nodes were preallocated and are sitting on the per-CPU
list.  Free them by calling the CPU dead callback.

Link: http://lkml.kernel.org/r/1480369871-5271-40-git-send-email-mawilcox@linuxonhyperv.com


Signed-off-by: default avatarMatthew Wilcox <willy@infradead.org>
Tested-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 847d3576

tools/testing/radix-tree/main.c

+3 −0
Original line number Diff line number Diff line
@@ -344,6 +344,9 @@ int main(int argc, char **argv) 
	iteration_test();

	single_thread_tests(long_run);



	/* Free any remaining preallocated nodes */

	radix_tree_cpu_dead(0);



	sleep(1);

	printf("after sleep(1): %d allocated, preempt %d\n",

		nr_allocated, preempt_count);

tools/testing/radix-tree/test.h

+1 −0
Original line number Diff line number Diff line
@@ -44,3 +44,4 @@ void radix_tree_dump(struct radix_tree_root *root); 
int root_tag_get(struct radix_tree_root *root, unsigned int tag);

unsigned long node_maxindex(struct radix_tree_node *);

unsigned long shift_maxindex(unsigned int shift);

int radix_tree_cpu_dead(unsigned int cpu);