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| author | Moshe Shemesh <moshe@nvidia.com> | 2022-04-11 21:31:06 +0300 |
|---|---|---|
| committer | Saeed Mahameed <saeedm@nvidia.com> | 2022-05-04 00:00:06 -0700 |
| commit | cb7786a76ea39f394f0a059787fe24fa8e340fb6 (patch) | |
| tree | b6033260843a95fce8fb31da02c99ada8895c847 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | b781bff882d16175277ca129c382886cb4c74a2c (diff) | |
net/mlx5: Fix deadlock in sync reset flow
The sync reset flow can lead to the following deadlock when
poll_sync_reset() is called by timer softirq and waiting on
del_timer_sync() for the same timer. Fix that by moving the part of the
flow that waits for the timer to reset_reload_work.
It fixes the following kernel Trace:
RIP: 0010:del_timer_sync+0x32/0x40
...
Call Trace:
<IRQ>
mlx5_sync_reset_clear_reset_requested+0x26/0x50 [mlx5_core]
poll_sync_reset.cold+0x36/0x52 [mlx5_core]
call_timer_fn+0x32/0x130
__run_timers.part.0+0x180/0x280
? tick_sched_handle+0x33/0x60
? tick_sched_timer+0x3d/0x80
? ktime_get+0x3e/0xa0
run_timer_softirq+0x2a/0x50
__do_softirq+0xe1/0x2d6
? hrtimer_interrupt+0x136/0x220
irq_exit+0xae/0xb0
smp_apic_timer_interrupt+0x7b/0x140
apic_timer_interrupt+0xf/0x20
</IRQ>
Fixes: 3c5193a87b0f ("net/mlx5: Use del_timer_sync in fw reset flow of halting poll")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Maher Sanalla <msanalla@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions