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| author | Tejun Heo <[email protected]> | 2024-09-06 18:17:09 +0000 |
|---|---|---|
| committer | Tejun Heo <[email protected]> | 2024-09-06 18:17:09 +0000 |
| commit | da330f5e4c197980ce4d343b1e557c9f33282770 (patch) | |
| tree | c986a45b591159c12242cefbfa410405638e37d8 /rust/helpers/helpers.c | |
| parent | Merge branch 'bpf/master' into for-6.12 (diff) | |
| download | kernel-da330f5e4c197980ce4d343b1e557c9f33282770.tar.gz kernel-da330f5e4c197980ce4d343b1e557c9f33282770.zip | |
sched_ext: Temporarily work around pick_task_scx() being called without balance_scx()
pick_task_scx() must be preceded by balance_scx() but there currently is a
bug where fair could say yes on balance() but no on pick_task(), which then
ends up calling pick_task_scx() without preceding balance_scx(). Work around
by dropping WARN_ON_ONCE() and ignoring cases which don't make sense.
This isn't great and can theoretically lead to stalls. However, for
switch_all cases, this happens only while a BPF scheduler is being loaded or
unloaded, and, for partial cases, fair will likely keep triggering this CPU.
This will be reverted once the fair behavior is fixed.
Signed-off-by: Tejun Heo <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Diffstat (limited to 'rust/helpers/helpers.c')
0 files changed, 0 insertions, 0 deletions