On Wed, 06 Dec 2017 10:07:44 +0700, Mulyadi Santosa said: > If it is indeed coming from nfs mount, check if it is mounted in > synchronous mode, and try to switch to async. See if it made any differences
Do note that async mode, due to how it works, *does* open a possibility of data loss - on a write, the remote NFS server can say "done" immediately, but then crash before committing the write to disk. However, being stuck in 'D' state means the remote server didn't reply at all, so that won't help much, especially for already-hung processes. Also: In this case, 'cat /proc/mounts' is your friend - using 'df' to see what's mounted will almost certainly also hang.
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