[LTP] [PATCH 1/1] cachestat01: Reduce required space on 64kb page size

[Petr Vorel]

ppc64le (6.10.1 on Tumbleweed) fails due 64kb page size requiring more
space:

cachestat01.c:39: TINFO: Number of pages: 4096
cachestat01.c:56: TPASS: cachestat(fd, cs_range, cs, 0) passed
cachestat01.c:59: TPASS: cs->nr_cache + cs->nr_evicted == num_pages (4096)
cachestat01.c:38: TINFO: Disable file synchronization
cachestat01.c:39: TINFO: Number of pages: 8192
cachestat01.c:46: TBROK: write(3,0x1000ddb0aa0,65536) failed: ENOSPC (28)

Fixes: 93b28ee69d ("Add cachestat01 test")
Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
First I thought we should use tst_fs_has_free() in each
test_cached_pages() run, but test uses .all_filesystems, thus it's
always 300 MB. Should we, just in case, use .dev_min_size = 300,
to make sure it runs correctly even we change the DEV_SIZE_MB value?

Or, should we really calculate required space with tst_fs_has_free(),
based on page size num_pages and * 1.1 (reserved space for metadata)?

Kind regards,
Petr

 testcases/kernel/syscalls/cachestat/cachestat01.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/testcases/kernel/syscalls/cachestat/cachestat01.c b/testcases/kernel/syscalls/cachestat/cachestat01.c
index f7f6275cbd..edb6335d9e 100644
--- a/testcases/kernel/syscalls/cachestat/cachestat01.c
+++ b/testcases/kernel/syscalls/cachestat/cachestat01.c
@@ -67,7 +67,7 @@ static void test_cached_pages(const unsigned int use_sync, const int num_pages)
 
 static void run(unsigned int use_sync)
 {
-	for (int i = 0; i < 15; i++)
+	for (int i = 0; i < page_size > 4096 ? 13 : 15; i++)
 		test_cached_pages(use_sync, 1 << i);
 }
 
-- 
2.45.2