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kms: Don't use kernel thread when headless

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We're not doing anything significant in the KMS thread anyway, so don't
make it a kernel thread, and don't ask to be real time scheduled (which
we wouldn't be anyway, but for clarity).

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3805>
(cherry picked from commit 5bca761148)
This commit is contained in:
Jonas Ådahl 2024-06-12 10:58:25 +02:00
parent 80d1b79849
commit a193da6d97
1 changed files with 6 additions and 1 deletions
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7
src/backends/native/meta-kms.c
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@ -370,6 +370,7 @@ meta_kms_new (MetaBackend *backend,
MetaKms *kms; MetaKms *kms;
const char *thread_type_string; const char *thread_type_string;
MetaThreadType thread_type = META_THREAD_TYPE_KERNEL; MetaThreadType thread_type = META_THREAD_TYPE_KERNEL;
gboolean wants_realtime_scheduling;
thread_type_string = g_getenv ("MUTTER_DEBUG_KMS_THREAD_TYPE"); thread_type_string = g_getenv ("MUTTER_DEBUG_KMS_THREAD_TYPE");
if (thread_type_string) if (thread_type_string)
@ -382,12 +383,16 @@ meta_kms_new (MetaBackend *backend,
g_assert_not_reached (); g_assert_not_reached ();
} }
wants_realtime_scheduling = !(flags & META_KMS_FLAG_NO_MODE_SETTING);
if (flags & META_KMS_FLAG_NO_MODE_SETTING)
thread_type = META_THREAD_TYPE_USER;
kms = g_initable_new (META_TYPE_KMS, kms = g_initable_new (META_TYPE_KMS,
NULL, error, NULL, error,
"backend", backend, "backend", backend,
"name", "KMS thread", "name", "KMS thread",
"thread-type", thread_type, "thread-type", thread_type,
"wants-realtime", TRUE, "wants-realtime", wants_realtime_scheduling,
NULL); NULL);
kms->flags = flags; kms->flags = flags;