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| author | David Vernet <void@manifault.com> | 2024-06-18 10:09:18 -1000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2024-06-18 10:09:18 -1000 |
| commit | 1538e33995eaf3f315cbb5506019b9f913ed8555 (patch) | |
| tree | 35c76929a08c4056d8bd04d6bde8afda218b6dc8 /lib | |
| parent | 7bb6f0810ecfb73a9d7a2ca56fb001e0201a6758 (diff) | |
| download | linux-stable-1538e33995eaf3f315cbb5506019b9f913ed8555.tar.gz linux-stable-1538e33995eaf3f315cbb5506019b9f913ed8555.tar.bz2 linux-stable-1538e33995eaf3f315cbb5506019b9f913ed8555.zip | |
sched_ext: Print sched_ext info when dumping stack
It would be useful to see what the sched_ext scheduler state is, and what
scheduler is running, when we're dumping a task's stack. This patch
therefore adds a new print_scx_info() function that's called in the same
context as print_worker_info() and print_stop_info(). An example dump
follows.
BUG: kernel NULL pointer dereference, address: 0000000000000999
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0
Oops: 0002 [#1] PREEMPT SMP
CPU: 13 PID: 2047 Comm: insmod Tainted: G O 6.6.0-work-10323-gb58d4cae8e99-dirty #34
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS unknown 2/2/2022
Sched_ext: qmap (enabled+all), task: runnable_at=-17ms
RIP: 0010:init_module+0x9/0x1000 [test_module]
...
v3: - scx_ops_enable_state_str[] definition moved to an earlier patch as
it's now used by core implementation.
- Convert jiffy delta to msecs using jiffies_to_msecs() instead of
multiplying by (HZ / MSEC_PER_SEC). The conversion is implemented in
jiffies_delta_msecs().
v2: - We are now using scx_ops_enable_state_str[] outside
CONFIG_SCHED_DEBUG. Move it outside of CONFIG_SCHED_DEBUG and to the
top. This was reported by Changwoo and Andrea.
Signed-off-by: David Vernet <void@manifault.com>
Reported-by: Changwoo Min <changwoo@igalia.com>
Reported-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/dump_stack.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/dump_stack.c b/lib/dump_stack.c index 222c6d6c8281..9581ef4efec5 100644 --- a/lib/dump_stack.c +++ b/lib/dump_stack.c @@ -68,6 +68,7 @@ void dump_stack_print_info(const char *log_lvl) print_worker_info(log_lvl, current); print_stop_info(log_lvl, current); + print_scx_info(log_lvl, current); } /** |