[dm-devel] [PATCH 3/7] dm: add reserved_bio_based_ios module parameter

[Mike Snitzer]

On Thu, Sep 12 2013 at  6:47pm -0400,
Mikulas Patocka <mpatocka at redhat.com> wrote:

> We don't need this. bio-based i/o should be fine with a small mempool, 
> there is no need to make it tunable.

I'd like to get Frank's insight here.  He clearly had an interest in
tuning bio-based also.  While 16 shouldn't really hurt it could still be
artifically high.  I'm not opposed to exposing a sane default but
allowing other to experiemnt (in production workloads) with smaller
values that still enable forward progress should memory get exhausted.

Mike