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runtime: don't clear timerModifiedEarliest if adjustTimers is 0

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This avoids a race when a new timerModifiedEarlier timer is created by
a different goroutine.

Fixes #47329

Change-Id: I6f6c87b4a9b5491b201c725c10bc98e23e0ed9d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/336432
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
This commit is contained in:
Ian Lance Taylor 2021-07-21 19:57:56 -07:00
parent fdb45acd1f
commit 798ec73519
3 changed files with 35 additions and 6 deletions
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2
src/runtime/runtime2.go
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@ -681,7 +681,7 @@ type p struct {
// timerModifiedEarlier status. Because the timer may have been
// modified again, there need not be any timer with this value.
// This is updated using atomic functions.
// This is 0 if the value is unknown.
// This is 0 if there are no timerModifiedEarlier timers.
timerModifiedEarliest uint64
// Per-P GC state