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Re: USB umass hard drive "failed to create xfers" when attaching (Paul Goyette) writes:

>> other data structures in KVA space and that helps. Something that almost
>> always helps is to reduce the value of the kernel variable desiredvnodes
>> (you may restore it a few seconds later).

>Would that be ``sysctl kern.maxvnodes'' or some other variable?

Yes, but often you don't come to running sysctl so you change the
variable from ddb.

To be clear: reducing it doesn't prevent the problem. Reducing it
temporarily frees memory, which also happens to remove some fragmentation.

                                Michael van Elst
                                "A potential Snark may lurk in every tree."

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