How do I debug Mac freezes caused by VMware Fusion
I never figured out how to debug this properly, but the following seems to have fixed it:

Run fsck (xfs_repair) on the VM filesystems. (I'm not sure whether this was really necessary; the crashing still kept happening until I did step 2. I'm just reporting it for completeness.)
In VMware Fusion, go to Virtual Machine -&gt; Settings -&gt; Advanced, and set &quot;Hard disk buffering&quot; to Disabled.