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| author | Juri Lelli <juri.lelli@redhat.com> | 2025-03-13 20:05:46 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-03-17 13:23:41 +0300 |
| commit | 45007c6fb5860cf63556a9cadc87c8984927e23d (patch) | |
| tree | a0d9740fa60106d34ff1577f96e82a4560ff94ea /kernel/sched/sched.h | |
| parent | 56209334dda1832c0a919e1d74768c6d0f3b2ca9 (diff) | |
| download | linux-45007c6fb5860cf63556a9cadc87c8984927e23d.tar.xz | |
sched/deadline: Generalize unique visiting of root domains
Bandwidth checks and updates that work on root domains currently employ
a cookie mechanism for efficiency. This mechanism is very much tied to
when root domains are first created and initialized.
Generalize the cookie mechanism so that it can be used also later at
runtime while updating root domains. Also, additionally guard it with
sched_domains_mutex, since domains need to be stable while updating them
(and it will be required for further dynamic changes).
Fixes: 53916d5fd3c0 ("sched/deadline: Check bandwidth overflow earlier for hotplug")
Reported-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Waiman Long <longman@redhat.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://lore.kernel.org/r/Z9MQaiXPvEeW_v7x@jlelli-thinkpadt14gen4.remote.csb
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index e8915ad5652c..5d853f91004e 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -998,7 +998,7 @@ struct root_domain { * Also, some corner cases, like 'wrap around' is dangerous, but given * that u64 is 'big enough'. So that shouldn't be a concern. */ - u64 visit_gen; + u64 visit_cookie; #ifdef HAVE_RT_PUSH_IPI /* |