From: mpdesouza@xxxxxxxx On Wed, 29 May 2024 16:19:41 -0400 Ryan Sullivan <rysulliv@xxxxxxxxxx> wrote: > Define a maximum allowable number of pids that can be livepatched in > test-syscall.sh as with extremely large machines the output from a > large number of processes overflows the dev/kmsg "expect" buffer in > the "check_result" function and causes a false error. I believe that 128 threads hammering getpid is good enough :) Tested-by: Marcos Paulo de Souza <mpdesouza@xxxxxxxx> Reviewed-by: Marcos Paulo de Souza <mpdesouza@xxxxxxxx> > > Reported-by: CKI Project <cki-project@xxxxxxxxxx> > Signed-off-by: Ryan Sullivan <rysulliv@xxxxxxxxxx> > --- > tools/testing/selftests/livepatch/test-syscall.sh | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/livepatch/test-syscall.sh b/tools/testing/selftests/livepatch/test-syscall.sh > index b76a881d4013..289eb7d4c4b3 100755 > --- a/tools/testing/selftests/livepatch/test-syscall.sh > +++ b/tools/testing/selftests/livepatch/test-syscall.sh > @@ -15,7 +15,10 @@ setup_config > > start_test "patch getpid syscall while being heavily hammered" > > -for i in $(seq 1 $(getconf _NPROCESSORS_ONLN)); do > +NPROC=$(getconf _NPROCESSORS_ONLN) > +MAXPROC=128 > + > +for i in $(seq 1 $(($NPROC < $MAXPROC ? $NPROC : $MAXPROC))); do > ./test_klp-call_getpid & > pids[$i]="$!" > done > -- > 2.44.0
