On Tue, Apr 14 2026, Pasha Tatashin wrote:
> Add a new test that creates 2000 LUO sessions before a kexec
> reboot and verifies their presence after the reboot. This ensures
> that the linked-block serialization mechanism works correctly for
> a large number of sessions.
>
> Signed-off-by: Pasha Tatashin <[email protected]>
> ---
> diff --git a/tools/testing/selftests/liveupdate/luo_test_utils.c
> b/tools/testing/selftests/liveupdate/luo_test_utils.c
> index 3c8721c505df..37c330b9bb36 100644
> --- a/tools/testing/selftests/liveupdate/luo_test_utils.c
> +++ b/tools/testing/selftests/liveupdate/luo_test_utils.c
> @@ -20,6 +20,7 @@
> #include <sys/stat.h>
> #include <errno.h>
> #include <stdarg.h>
> +#include <sys/resource.h>
>
> #include "luo_test_utils.h"
>
> @@ -28,6 +29,30 @@ int luo_open_device(void)
> return open(LUO_DEVICE, O_RDWR);
> }
>
> +void luo_ensure_nofile_limit(long min_limit)
Since you are adding this to luo_test_utils anyway, I think you should
do it in patch 3 and use it there too.
LGTM otherwise.
> +{
> + struct rlimit hl;
> +
> + if (getrlimit(RLIMIT_NOFILE, &hl) < 0)
> + ksft_exit_fail_msg("getrlimit failed: %s\n", strerror(errno));
> +
> + if (hl.rlim_cur >= min_limit)
> + return;
> +
> + hl.rlim_cur = min_limit;
> + if (hl.rlim_cur > hl.rlim_max)
> + hl.rlim_max = hl.rlim_cur;
> +
> + if (setrlimit(RLIMIT_NOFILE, &hl) < 0) {
> + if (errno == EPERM) {
> + ksft_exit_skip("Insufficient privileges to set
> RLIMIT_NOFILE to %ld\n",
> + hl.rlim_cur);
> + }
> + ksft_exit_fail_msg("setrlimit to %ld failed: %s\n",
> + hl.rlim_cur, strerror(errno));
> + }
> +}
> +
> int luo_create_session(int luo_fd, const char *name)
> {
> struct liveupdate_ioctl_create_session arg = { .size = sizeof(arg) };
--
Regards,
Pratyush Yadav
