Patch "sched_ext: Fix dsq_local_on selftest" has been added to the 6.12-stable tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This is a note to let you know that I've just added the patch titled

    sched_ext: Fix dsq_local_on selftest

to the 6.12-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:
     sched_ext-fix-dsq_local_on-selftest.patch
and it can be found in the queue-6.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 52849923c02940c8d557561f9981c7148db9d51b
Author: Tejun Heo <tj@xxxxxxxxxx>
Date:   Tue Dec 24 14:09:15 2024 -1000

    sched_ext: Fix dsq_local_on selftest
    
    [ Upstream commit ce2b93fc1dfa1c82f2576aa571731c4e5dcc8dd7 ]
    
    The dsp_local_on selftest expects the scheduler to fail by trying to
    schedule an e.g. CPU-affine task to the wrong CPU. However, this isn't
    guaranteed to happen in the 1 second window that the test is running.
    Besides, it's odd to have this particular exception path tested when there
    are no other tests that verify that the interface is working at all - e.g.
    the test would pass if dsp_local_on interface is completely broken and fails
    on any attempt.
    
    Flip the test so that it verifies that the feature works. While at it, fix a
    typo in the info message.
    
    Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
    Reported-by: Ihor Solodrai <ihor.solodrai@xxxxx>
    Link: http://lkml.kernel.org/r/Z1n9v7Z6iNJ-wKmq@xxxxxxxxxxxxxxx
    Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c b/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c
index 6325bf76f47ee..fbda6bf546712 100644
--- a/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c
+++ b/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c
@@ -43,7 +43,10 @@ void BPF_STRUCT_OPS(dsp_local_on_dispatch, s32 cpu, struct task_struct *prev)
 	if (!p)
 		return;
 
-	target = bpf_get_prandom_u32() % nr_cpus;
+	if (p->nr_cpus_allowed == nr_cpus)
+		target = bpf_get_prandom_u32() % nr_cpus;
+	else
+		target = scx_bpf_task_cpu(p);
 
 	scx_bpf_dsq_insert(p, SCX_DSQ_LOCAL_ON | target, SCX_SLICE_DFL, 0);
 	bpf_task_release(p);
diff --git a/tools/testing/selftests/sched_ext/dsp_local_on.c b/tools/testing/selftests/sched_ext/dsp_local_on.c
index 472851b568548..0ff27e57fe430 100644
--- a/tools/testing/selftests/sched_ext/dsp_local_on.c
+++ b/tools/testing/selftests/sched_ext/dsp_local_on.c
@@ -34,9 +34,10 @@ static enum scx_test_status run(void *ctx)
 	/* Just sleeping is fine, plenty of scheduling events happening */
 	sleep(1);
 
-	SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_ERROR));
 	bpf_link__destroy(link);
 
+	SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_UNREG));
+
 	return SCX_TEST_PASS;
 }
 
@@ -50,7 +51,7 @@ static void cleanup(void *ctx)
 struct scx_test dsp_local_on = {
 	.name = "dsp_local_on",
 	.description = "Verify we can directly dispatch tasks to a local DSQs "
-		       "from osp.dispatch()",
+		       "from ops.dispatch()",
 	.setup = setup,
 	.run = run,
 	.cleanup = cleanup,




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux