| commit | 0c0e8f224d5724e317952f77d215a752a3a7b7d9 | [log] [tgz] |
|---|---|---|
| author | Cherry Zhang <cherryyz@google.com> | Mon Mar 16 20:08:00 2020 -0400 |
| committer | Cherry Zhang <cherryyz@google.com> | Wed Mar 18 16:00:44 2020 +0000 |
| tree | c190a79fde5ddd44ab0987067accfc3ae84b597e | |
| parent | 6412750f32224f6820f781d09b2092c5c358dddc [diff] |
runtime: don't send preemption signal if there is a signal pending If multiple threads call preemptone to preempt the same M, it may send many signals to the same M such that it hardly make progress, causing live-lock problem. Only send a signal if there isn't already one pending. Fixes #37741. Change-Id: Id94adb0b95acbd18b23abe637a8dcd81ab41b452 Reviewed-on: https://go-review.googlesource.com/c/go/+/223737 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
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