[stgt] [PATCH 1/3] Compile iser driver as a loadable module

[Andy Grover]

On 10/26/2011 10:37 AM, Alexander Nezhinsky wrote:
>>>> With iser being built in, the tgtd package pulls in two more
>>>> libraries, libibverbs and librdmacm, is the motivation here to
>>>> eliminate that as of the overhead?
>>> Yes.

> I think that in general the idea of modularizaton is a good and a
> very appropriate one.
> 
> Still, i have a few reservations about the suggested implementation. 
> It singles out iser as the only module, which is "modularized-out". 
> This is ok for now, and this is surely what a multitude of users
> would like to do, but i would opt for a change which is
> framework-wide.

Hi Alexander,

The only objective I wanted to accomplish with this patch was fewer
runtime library dependencies, which was best done by making iser a
shared object. Beyond that, it's not clear to me that the added
complexity of implementation and additional cmdline parameters justify
the benefits.

[driver and bs modularization proposal snipped]

> * I am willing to co-operate actively in implementation of these
> features, when all agree on their design.

My only comment would be that since tgt is open source, the need for
loadable modules is lessened. A new bs or driver can be added and tgt
recompiled easily for a user's unique needs, and more widely useful new
drivers should be included upstream.

In fact, in looking at my original patch, I'm wondering now if *it*
meets the above criteria. Should I have just made this change in my
distro's packaging, instead of submitting it upstream? I'm not sure
anymore :)

BTW the tgt_driver state check patches you just posted look good to me.

Regards -- Andy
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