[PATCH v2 6/6] Btrfs: use less memory for delalloc sanity tests

[Omar Sandoval <osandov@osandov.com>]

From: Omar Sandoval <osandov@fb.com>

test_find_delalloc() allocates 256 MB worth of pages. That's all of the
RAM that my MIPS emulator has, so it ends up panicking after it OOM
kills everything. We don't actually need to use that much for this test.

Signed-off-by: Omar Sandoval <osandov@fb.com>
---
 fs/btrfs/tests/extent-io-tests.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/tests/extent-io-tests.c b/fs/btrfs/tests/extent-io-tests.c
index caad80b..ea9c91b 100644
--- a/fs/btrfs/tests/extent-io-tests.c
+++ b/fs/btrfs/tests/extent-io-tests.c
@@ -73,8 +73,8 @@ static int test_find_delalloc(u32 sectorsize)
 	struct page *page;
 	struct page *locked_page = NULL;
 	unsigned long index = 0;
-	u64 total_dirty = SZ_256M;
-	u64 max_bytes = SZ_128M;
+	u64 total_dirty = sectorsize * 256;
+	u64 max_bytes = total_dirty >> 1;
 	u64 start, end, test_start;
 	u64 found;
 	int ret = -EINVAL;
@@ -138,7 +138,7 @@ static int test_find_delalloc(u32 sectorsize)
 	 * |--- delalloc ---|
 	 *           |--- search ---|
 	 */
-	test_start = SZ_64M;
+	test_start = max_bytes >> 1;
 	locked_page = find_lock_page(inode->i_mapping,
 				     test_start >> PAGE_SHIFT);
 	if (!locked_page) {
@@ -226,7 +226,7 @@ static int test_find_delalloc(u32 sectorsize)
 	 * range we want to find.
 	 */
 	page = find_get_page(inode->i_mapping,
-			     (max_bytes + SZ_1M) >> PAGE_SHIFT);
+			     (max_bytes + PAGE_SIZE) >> PAGE_SHIFT);
 	if (!page) {
 		test_msg("Couldn't find our page\n");
 		goto out_bits;
-- 
2.10.0