How can I determine if a filesystem is frozen in a vmcore?

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Introduction

When a system hangs, one diagnostic step which is often taken is to take a memory image of the machine (vmcore) and analyze it with the crash tool. One possible root cause of a hung system is that one or more filesystems, and often the root filesystem, is frozen for updates, and all processes which need write any data to the filesystem will block until the filesystem bec...

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