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radix tree test suite: Test radix_tree_replace_slot() for multiorder entries 

When we replace a multiorder entry, check that all indices reflect the
new value.

Also, compile the test suite with -O2, which shows other problems with
the code due to some dodgy pointer operations in the radix tree code.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox 2016-09-22 11:53:34 -07:00 committed by Linus Torvalds
parent 9c0e28a7be
commit 62fd5258eb
2 changed files with 13 additions and 5 deletions
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2
tools/testing/radix-tree/Makefile
View File

@ -1,5 +1,5 @@
CFLAGS += -I. -g -Wall -D_LGPL_SOURCE
CFLAGS += -I. -g -O2 -Wall -D_LGPL_SOURCE
LDFLAGS += -lpthread -lurcu
TARGETS = main
OFILES = main.o radix-tree.o linux.o test.o tag_check.o find_next_bit.o \

16
tools/testing/radix-tree/multiorder.c
View File

@ -124,6 +124,8 @@ static void multiorder_check(unsigned long index, int order)
unsigned long i;
unsigned long min = index & ~((1UL << order) - 1);
unsigned long max = min + (1UL << order);
void **slot;
struct item *item2 = item_create(min);
RADIX_TREE(tree, GFP_KERNEL);
printf("Multiorder index %ld, order %d\n", index, order);
@ -139,13 +141,19 @@ static void multiorder_check(unsigned long index, int order)
item_check_absent(&tree, i);
for (i = max; i < 2*max; i++)
item_check_absent(&tree, i);
for (i = min; i < max; i++)
assert(radix_tree_insert(&tree, i, item2) == -EEXIST);
slot = radix_tree_lookup_slot(&tree, index);
free(*slot);
radix_tree_replace_slot(slot, item2);
for (i = min; i < max; i++) {
static void *entry = (void *)
(0xA0 | RADIX_TREE_EXCEPTIONAL_ENTRY);
assert(radix_tree_insert(&tree, i, entry) == -EEXIST);
struct item *item = item_lookup(&tree, i);
assert(item != 0);
assert(item->index == min);
}
assert(item_delete(&tree, index) != 0);
assert(item_delete(&tree, min) != 0);
for (i = 0; i < 2*max; i++)
item_check_absent(&tree, i);