[Webkit-unassigned] [Bug 221027] New: REGRESSION(r271929): MobileSafari hangs upon launch due to a trivial deadlock in IOSurfacePool::setPoolSize

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221027

            Bug ID: 221027
           Summary: REGRESSION(r271929): MobileSafari hangs upon launch
                    due to a trivial deadlock in
                    IOSurfacePool::setPoolSize
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rniwa at webkit.org

We hang inside IOSurfacePool::setPoolSize(unsigned long) via IOSurfacePool::discardAllSurfacesInternal()
as the latter tries to grab the lock while setPoolSize holds a locker.

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