lib: add igt_allow_unlimited_files()

Share the implementation to tweak the maximum number of open files.
The version in tests/i915/gem_exec_reuse.c was a little bit different,
but I don't think it needs to be because it would still return a
failure if any of the calls to setrlimit() fail. So I'm using the other
one.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 1 insertions, 21 deletions

diff --git a/tests/i915/gem_concurrent_all.c b/tests/i915/gem_concurrent_all.c
index 6049372d..3ddaab82 100644
--- a/tests/i915/gem_concurrent_all.c
+++ b/tests/i915/gem_concurrent_all.c
@@ -1678,26 +1678,6 @@ num_buffers(uint64_t max,
 	return n;
 }
 
-static bool allow_unlimited_files(void)
-{
-	struct rlimit rlim;
-	unsigned nofile_rlim = 1024*1024;
-
-	FILE *file = fopen("/proc/sys/fs/file-max", "r");
-	if (file) {
-		igt_assert(fscanf(file, "%u", &nofile_rlim) == 1);
-		igt_info("System limit for open files is %u\n", nofile_rlim);
-		fclose(file);
-	}
-
-	if (getrlimit(RLIMIT_NOFILE, &rlim))
-		return false;
-
-	rlim.rlim_cur = nofile_rlim;
-	rlim.rlim_max = nofile_rlim;
-	return setrlimit(RLIMIT_NOFILE, &rlim) == 0;
-}
-
 igt_main
 {
 	const struct access_mode modes[] = {
@@ -1821,7 +1801,7 @@ igt_main
 		all = true;
 
 	igt_fixture {
-		allow_unlimited_files();
+		igt_allow_unlimited_files();
 
 		fd = drm_open_driver(DRIVER_INTEL);
 		igt_require_gem(fd);