d5641e0d7e8f55937fbc3a7ecd667e42c5836d80
Remount, and subsequent umount, attempts can hang for inaccessible network based mount points. This can leave a system in a hard hang state that requires a hard reset in order to recover. This change moves the remount, and umount attempts into separate child processes. The remount and umount operations will block for up to 90 seconds (DEFAULT_TIMEOUT_USEC). Should those waits fail, the parent will issue a SIGKILL to the child and continue with the shutdown efforts. In addition, instead of only reporting some additional errors on the final attempt, failures are reported as they occur.
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