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| author | Vincent Guittot <vincent.guittot@linaro.org> | 2023-03-17 17:08:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-30 12:51:42 +0200 |
| commit | 6cf4184211a92523ee96abaf989ee48282edfdb6 (patch) | |
| tree | fa18b61f86385f89406c8b32b02f23e728f24d32 /lib/net_utils.c | |
| parent | ab2bc893b74c489f77b9f6530a1161622aefdc76 (diff) | |
sched/fair: Sanitize vruntime of entity being migrated
commit a53ce18cacb477dd0513c607f187d16f0fa96f71 upstream.
Commit 829c1651e9c4 ("sched/fair: sanitize vruntime of entity being placed")
fixes an overflowing bug, but ignore a case that se->exec_start is reset
after a migration.
For fixing this case, we delay the reset of se->exec_start after
placing the entity which se->exec_start to detect long sleeping task.
In order to take into account a possible divergence between the clock_task
of 2 rqs, we increase the threshold to around 104 days.
Fixes: 829c1651e9c4 ("sched/fair: sanitize vruntime of entity being placed")
Originally-by: Zhang Qiao <zhangqiao22@huawei.com>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Zhang Qiao <zhangqiao22@huawei.com>
Link: https://lore.kernel.org/r/20230317160810.107988-1-vincent.guittot@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/net_utils.c')
0 files changed, 0 insertions, 0 deletions