[dcmf] Lockless ROMIO driver

[Bob Cernohous]

What I gave to Joe, for patching ad_bgl back into 1.0.7rc1, included 
your/my patches up until your last set of 9 patches on Friday.

So basically I stripped out aio and enabled ad_ufs/pvfs but not some of 
your very latest fixes. 

I wrapped some of the later common romio patches with ROMIO_BGL to try to 
play nice/first-class citizen.  I haven't seen Joe's full patch set yet. 
There likely is other cleanup/first-class citizen changes still needed on 
old patches that we've had in the code for years.

I also know ad_bgl itself likely needs some further updates.   You've put 
fixes/enhancements/logging into common code that was duplicated a long 
time ago in ad_bgl.  So we should update ad_bgl or eliminate the dup code, 
but that's a later/ongoing project.

Bob Cernohous:  (T/L 553) 507-253-6093

BobC at us.ibm.com
IBM Rochester, Building 030-2(C335), Department 61L
3605 Hwy 52 North, Rochester,  MN 55901-7829

> Chaos reigns within.
> Reflect, repent, and reboot.
> Order shall return.


dcmf-bounces at lists.anl-external.org wrote on 02/19/2008 03:38:26 PM:

> On Tue, Feb 12, 2008 at 02:22:01PM -0600, Rob Latham wrote:
> > These patches re-introduce ad_ufs to ROMIO, but do so in a lock-free
> > way.  This is my first git experience, so sorry for the messy
> > subject lines.
> 
> Hey
> 
> This patch series still makes sense for the 1.0.4-based code, but
> after talking with some IBM folks today it sounds like in the end we
> want a very small (if it exists at all) bluegene patch. 
> 
> Ideally, mpich-1.0.7 will have all the BlueGene changes, including a
> lock-free ROMIO driver for PVFS.  I'm going to re-work this patch
> a bit and turn it into a first-class ROMIO citizen. 
> 
> ==rob
> 
> -- 
> Rob Latham
> Mathematics and Computer Science Division    A215 0178 EA2D B059 8CDF
> Argonne National Lab, IL USA                 B29D F333 664A 4280 315B
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