Fix GThreadPool initialization that is breaking createrepo_c (BZ #1795052)
Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>
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Stephen Gallagher
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From 78bae85d215e3e1ce77c828c2075d216edbc36f6 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
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Date: Sat, 25 Jan 2020 11:08:22 +0200
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Subject: [PATCH] Fix initialization logic of GThreadPool if the first created
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pool is an exclusive one
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Previously we would only ever run the initialization code once, but part
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of it only if a non-exclusive pool was created. This caused the shared
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state to be inconsistent if the first pool to be created was exclusive
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and the second non-exclusive.
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Fixes https://gitlab.gnome.org/GNOME/glib/issues/2012
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---
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glib/gthreadpool.c | 67 +++++++++++++++++++++++-----------------------
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1 file changed, 33 insertions(+), 34 deletions(-)
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diff --git a/glib/gthreadpool.c b/glib/gthreadpool.c
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index dd6546be4568c7b819145d8cbc6654c9c182f767..ed34fcd525b63937636ae31b1461af8341e578e5 100644
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--- a/glib/gthreadpool.c
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+++ b/glib/gthreadpool.c
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@@ -579,42 +579,41 @@ g_thread_pool_new (GFunc func,
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G_LOCK (init);
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if (!unused_thread_queue)
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- {
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unused_thread_queue = g_async_queue_new ();
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- /* For the very first non-exclusive thread-pool we remember the thread
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- * scheduler settings of the thread creating the pool, if supported by
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- * the GThread implementation. This is then used for making sure that
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- * all threads created on the non-exclusive thread-pool have the same
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- * scheduler settings, and more importantly don't just inherit them
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- * from the thread that just happened to push a new task and caused
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- * a new thread to be created.
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- *
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- * Not doing so could cause real-time priority threads or otherwise
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- * threads with problematic scheduler settings to be part of the
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- * non-exclusive thread-pools.
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- *
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- * If this is not supported by the GThread implementation then we here
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- * start a thread that will inherit the scheduler settings from this
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- * very thread and whose only purpose is to spawn new threads with the
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- * same settings for use by the non-exclusive thread-pools.
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- *
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- *
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- * For non-exclusive thread-pools this is not required as all threads
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- * are created immediately below and are running forever, so they will
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- * automatically inherit the scheduler settings from this very thread.
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- */
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- if (!exclusive)
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+
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+ /* For the very first non-exclusive thread-pool we remember the thread
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+ * scheduler settings of the thread creating the pool, if supported by
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+ * the GThread implementation. This is then used for making sure that
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+ * all threads created on the non-exclusive thread-pool have the same
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+ * scheduler settings, and more importantly don't just inherit them
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+ * from the thread that just happened to push a new task and caused
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+ * a new thread to be created.
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+ *
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+ * Not doing so could cause real-time priority threads or otherwise
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+ * threads with problematic scheduler settings to be part of the
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+ * non-exclusive thread-pools.
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+ *
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+ * If this is not supported by the GThread implementation then we here
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+ * start a thread that will inherit the scheduler settings from this
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+ * very thread and whose only purpose is to spawn new threads with the
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+ * same settings for use by the non-exclusive thread-pools.
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+ *
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+ *
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+ * For non-exclusive thread-pools this is not required as all threads
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+ * are created immediately below and are running forever, so they will
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+ * automatically inherit the scheduler settings from this very thread.
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+ */
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+ if (!exclusive && !have_shared_thread_scheduler_settings && !spawn_thread_queue)
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+ {
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+ if (g_thread_get_scheduler_settings (&shared_thread_scheduler_settings))
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{
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- if (g_thread_get_scheduler_settings (&shared_thread_scheduler_settings))
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- {
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- have_shared_thread_scheduler_settings = TRUE;
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- }
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- else
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- {
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- spawn_thread_queue = g_async_queue_new ();
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- g_cond_init (&spawn_thread_cond);
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- g_thread_new ("pool-spawner", g_thread_pool_spawn_thread, NULL);
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- }
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+ have_shared_thread_scheduler_settings = TRUE;
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+ }
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+ else
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+ {
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+ spawn_thread_queue = g_async_queue_new ();
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+ g_cond_init (&spawn_thread_cond);
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+ g_thread_new ("pool-spawner", g_thread_pool_spawn_thread, NULL);
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}
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}
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G_UNLOCK (init);
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--
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2.24.1
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10
glib2.spec
10
glib2.spec
@ -2,7 +2,7 @@
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Name: glib2
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Name: glib2
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Version: 2.63.4
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Version: 2.63.4
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Release: 2%{?dist}
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Release: 3%{?dist}
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Summary: A library of handy utility functions
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Summary: A library of handy utility functions
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License: LGPLv2+
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License: LGPLv2+
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@ -35,6 +35,11 @@ Recommends: shared-mime-info
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# glib 2.59.0 hash table changes broke older gcr versions / password prompts in gnome-shell
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# glib 2.59.0 hash table changes broke older gcr versions / password prompts in gnome-shell
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Conflicts: gcr < 3.28.1
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Conflicts: gcr < 3.28.1
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# Patches from upstream
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# Fix for https://gitlab.gnome.org/GNOME/glib/issues/2012
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Patch0001: 0001-Fix-initialization-logic-of-GThreadPool-if-the-first.patch
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%description
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%description
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GLib is the low-level core library that forms the basis for projects
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GLib is the low-level core library that forms the basis for projects
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such as GTK+ and GNOME. It provides data structure handling for C,
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such as GTK+ and GNOME. It provides data structure handling for C,
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@ -216,6 +221,9 @@ glib-compile-schemas %{_datadir}/glib-2.0/schemas &> /dev/null || :
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%{_datadir}/installed-tests
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%{_datadir}/installed-tests
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%changelog
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%changelog
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* Wed Jan 29 2020 Stephen Gallagher <sgallagh@redhat.com> - 2.63.4-3
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- Fix GThreadPool initialization that is breaking createrepo_c (BZ #1795052)
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* Tue Jan 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 2.63.4-2
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* Tue Jan 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 2.63.4-2
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- Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild
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- Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild
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