This is a note to let you know that I've just added the patch titled selftests/resctrl: Fix incorrect parsing of option "-t" to the 5.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: selftests-resctrl-fix-incorrect-parsing-of-option-t.patch and it can be found in the queue-5.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 1421ec684a43379b2aa3cfda20b03d38282dc990 Mon Sep 17 00:00:00 2001 From: Xiaochen Shen <xiaochen.shen@xxxxxxxxx> Date: Thu, 27 May 2021 17:31:53 +0800 Subject: selftests/resctrl: Fix incorrect parsing of option "-t" From: Xiaochen Shen <xiaochen.shen@xxxxxxxxx> commit 1421ec684a43379b2aa3cfda20b03d38282dc990 upstream. Resctrl test suite accepts command line argument "-t" to specify the unit tests to run in the test list (e.g., -t mbm,mba,cmt,cat) as documented in the help. When calling strtok() to parse the option, the incorrect delimiters argument ":\t" is used. As a result, passing "-t mbm,mba,cmt,cat" throws an invalid option error. Fix this by using delimiters argument "," instead of ":\t" for parsing of unit tests list. At the same time, remove the unnecessary "spaces" between the unit tests in help documentation to prevent confusion. Fixes: 790bf585b0ee ("selftests/resctrl: Add Cache Allocation Technology (CAT) selftest") Fixes: 78941183d1b1 ("selftests/resctrl: Add Cache QoS Monitoring (CQM) selftest") Fixes: ecdbb911f22d ("selftests/resctrl: Add MBM test") Fixes: 034c7678dd2c ("selftests/resctrl: Add README for resctrl tests") Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Xiaochen Shen <xiaochen.shen@xxxxxxxxx> Reviewed-by: Tony Luck <tony.luck@xxxxxxxxx> Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/testing/selftests/resctrl/README | 2 +- tools/testing/selftests/resctrl/resctrl_tests.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) --- a/tools/testing/selftests/resctrl/README +++ b/tools/testing/selftests/resctrl/README @@ -47,7 +47,7 @@ Parameter '-h' shows usage information. usage: resctrl_tests [-h] [-b "benchmark_cmd [options]"] [-t test list] [-n no_of_bits] -b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CQM default benchmark is builtin fill_buf - -t test list: run tests specified in the test list, e.g. -t mbm, mba, cqm, cat + -t test list: run tests specified in the test list, e.g. -t mbm,mba,cqm,cat -n no_of_bits: run cache tests using specified no of bits in cache bit mask -p cpu_no: specify CPU number to run the test. 1 is default -h: help --- a/tools/testing/selftests/resctrl/resctrl_tests.c +++ b/tools/testing/selftests/resctrl/resctrl_tests.c @@ -40,7 +40,7 @@ static void cmd_help(void) printf("\t-b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CQM"); printf("\t default benchmark is builtin fill_buf\n"); printf("\t-t test list: run tests specified in the test list, "); - printf("e.g. -t mbm, mba, cqm, cat\n"); + printf("e.g. -t mbm,mba,cqm,cat\n"); printf("\t-n no_of_bits: run cache tests using specified no of bits in cache bit mask\n"); printf("\t-p cpu_no: specify CPU number to run the test. 1 is default\n"); printf("\t-h: help\n"); @@ -98,7 +98,7 @@ int main(int argc, char **argv) return -1; } - token = strtok(NULL, ":\t"); + token = strtok(NULL, ","); } break; case 'p': Patches currently in stable-queue which might be from xiaochen.shen@xxxxxxxxx are queue-5.12/selftests-resctrl-fix-incorrect-parsing-of-option-t.patch