These tests are timeouts in GTK Linux 64 release test bots but PASS locally: /TestWTF WTF_WordLock.ContendedShortSection WTF_WordLock.ContendedLongSection WTF_WordLock.ManyContendedShortSections This may? also be related to https://bugs.webkit.org/show_bug.cgi?id=177839 which was reopened in ~2018 and discusses WordLock WTF algorithm issues.
See also webkit.org/b/246603 where WTF_WordLock.ManyContendedLongSections timed out on EWS, and is still the case.
Gardened in https://github.com/WebKit/WebKit/pull/16719
Happens also randomly on the EWS for WPE API Tests Updated expectations on 270468@main