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author | Caz Yokoyama <caz.yokoyama@intel.com> | 2019-04-25 10:23:13 -0700 |
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committer | Petri Latvala <petri.latvala@intel.com> | 2019-04-26 12:41:26 +0300 |
commit | 1184e5778ac3ffd8caf3f4d5b9e2b30a736d64d7 (patch) | |
tree | 46b4323819cec3baafcd79d9242067404f3daeac /lib/igt_aux.c | |
parent | 2fc51d5528eda79fe1856e0b85e6b71e3fb79c47 (diff) |
lib: consolidate duplicated define of vfs_file_max(void)
Remove it from intel_os.c and gem_exec_reuse.c and globally
define in igt_aux.c.
v3: update comment in the code and commit message.
Signed-off-by: Caz Yokoyama <caz.yokoyama@intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
Diffstat (limited to 'lib/igt_aux.c')
-rw-r--r-- | lib/igt_aux.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/igt_aux.c b/lib/igt_aux.c index 3dd68d95..1a70edcc 100644 --- a/lib/igt_aux.c +++ b/lib/igt_aux.c @@ -1646,3 +1646,27 @@ bool igt_allow_unlimited_files(void) rlim.rlim_max = nofile_rlim; return setrlimit(RLIMIT_NOFILE, &rlim) == 0; } + +/** + * vfs_file_max: report maximum number of files + * + * Get the global system-wide maximum of open files the kernel allows, + * by reading /proc/sys/fs/file-max. Fails the current subtest if + * reading the file fails, and returns a suitable best guess if it + * cannot be opened. + * + * Returns: System-wide maximum of open files, or a best effort guess. + */ +uint64_t vfs_file_max(void) +{ + static long long unsigned max; + if (max == 0) { + FILE *file = fopen("/proc/sys/fs/file-max", "r"); + max = 80000; + if (file) { + igt_assert(fscanf(file, "%llu", &max) == 1); + fclose(file); + } + } + return max; +} |