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Bug #14364
openblocked eventfd write fails interruption
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Medium
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Description
If a thread is writing to an eventfd handle which would overflow, it will block until some reader "makes room" for the written value, or it is interrupted by a signal. In the latter case, the write does not fail with EINTR, but rather appears to succeed, even though the value of the eventfd is unchanged. This should be fixed so it emits the appropriate EINTR.
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