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From: "Fabio Berton" <>
Subject: [1.46][PATCH 5/6] runqueue: Fix issues with multiconfig deferred task deadlock messages
Date: Wed, 15 Feb 2023 10:43:20 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

From: Richard Purdie <>

In multiconfig builds with large numbers of identical tasks, builds were
deadlocking after recent runqueue changes upon rebuilds where there was
heavy sstate usage (i.e. on second builds after a first completed).

The issue was that deferred tasks were being left indefinitely on
the deferred list. The deadlock handler was then "breaking" things
by failing tasks that had already succeeded, leading to the task
being on both covered and not covered lists, giving a further error.

The fix is to clean up the deferred task list when each setscene task
completes. I'd previously been hoping to avoid iterating that list
but it appears unavoidable.

[YOCTO #14342]

Signed-off-by: Richard Purdie <>
(cherry picked from commit ae24a0f2d2d8b4b5ec10efabd0e9362e560832ea)
Signed-off-by: Fabio Berton <>
 lib/bb/ | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/bb/ b/lib/bb/
index c7f50fde..f63a2191 100644
--- a/lib/bb/
+++ b/lib/bb/
@@ -1975,6 +1975,12 @@ class RunQueueExecute:
                 logger.debug(1, "Marking task %s as buildable", revdep)
+        for t in self.sq_deferred.copy():
+            if self.sq_deferred[t] == task:
+                logger.debug(2, "Deferred task %s now buildable" % t)
+                del self.sq_deferred[t]
+                update_scenequeue_data([t], self.sqdata, self.rqdata, self.rq, self.cooker, self.stampcache, self, summary=False)
     def task_complete(self, task):
         self.stats.taskCompleted(), self.stats, self.rq), self.cfgData)

  parent reply	other threads:[~2023-02-15 10:44 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-15 10:43 [1.46][PATCH 0/6] Backport multiconfig deferred fixes Fabio Berton
2023-02-15 10:43 ` [1.46][PATCH 1/6] runqueue: Fix multiconfig deferred task sstate validity caching issue Fabio Berton
2023-02-15 10:43 ` [1.46][PATCH 2/6] runqueue: Handle deferred task rehashing in multiconfig builds Fabio Berton
2023-02-15 10:43 ` [1.46][PATCH 3/6] runqueue: Improve multiconfig deferred task issues Fabio Berton
2023-02-15 10:43 ` [1.46][PATCH 4/6] runqueue: Avoid deadlock avoidance task graph corruption Fabio Berton
2023-02-15 10:43 ` Fabio Berton [this message]
2023-02-15 10:43 ` [1.46][PATCH 6/6] runqueue: Ensure deferred tasks are sorted by multiconfig Fabio Berton
2023-02-17 15:08 ` [bitbake-devel] [1.46][PATCH 0/6] Backport multiconfig deferred fixes Richard Purdie

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