Re: [dm-devel] [PATCH v2] dm mpath: add feature flag to control call to blk_abort_queue

[Mike Snitzer <snitzer redhat com>]

On Thu, Nov 18 2010 at  2:20am -0500,
Mike Anderson <andmike linux vnet ibm com> wrote:

> Mike S,
> 
> Thanks for doing the refresh / update of the patch.
> I just did a quick test and did not see any issues but did have a couple
> of questions.
> 
> Two questions:
> 
> 1.) Should we bump the multipath targets version for this change?

Yes, not doing so was an oversight.  I'll bump the version and post v3.

> 2.) A general question on the length of the feature name
> "abort_queue_on_failure" while the descriptive name is nice I noticed if
> I have two features that the multipath output line starts wrapping. I
> guess we could make the feature name shorter, but eventually if we added
> more features the line would eventually wrap so a shorted name will just
> stop wrapping now.

I'm open to other suggestions for the feature name.

I agree that we don't want feature names to get too long.  But they do
need to be descriptive.  So we need to have some balance.  I could've
used "abort_q_on_failure" but I went for "queue" to maintain symmetry
with "queue_if_no_path".  Similarly, abbreviating "failure" to "fail"
seemed like it didn't buy much (less clear?). *shrug* Maybe
"abort_queue_on_fail" offers a better balance?

As for the wrapping, I don't think there is anything we can do to avoid
it (given the current interface).

Thanks,
Mike