On Thu, 2007-07-12 at 10:45 -0700, Bart Smaalders wrote:
> <aside>
> For those of us who've been swapping to zvols for some time, can
> you describe the failure modes?
> </aside>

I asked about this during the zfs boot inception review -- the high
level answer is occasional deadlock in low-memory situations (zfs needs
to allocate memory to free memory via pageout/swapout, but the system
doesn't have any to give zfs)

the relevant bug appears to be:

6528296 system hang while zvol swap space shorted







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