[ofa-general] Another XRC binary compatable issue for different pthread version.

[Tang, Changqing]

Any application code access events_completed field ?  HP-MPI does not.

If no user code access 'mutex' 'cond' and 'events_completed', I suggest to
put the XRC fields in the middle of this structure.


--CQ


> -----Original Message-----
> From: Gleb Natapov [mailto:glebn at voltaire.com]
> Sent: Monday, February 18, 2008 9:21 AM
> To: Tang, Changqing
> Cc: Roland Dreier; general at lists.openfabrics.org
> Subject: Re: [ofa-general] Another XRC binary compatable
> issue for different pthread version.
>
> On Mon, Feb 18, 2008 at 03:15:01PM +0000, Tang, Changqing wrote:
> >
> > Without using XRC fields, everything seems to work OK.
> >
> It's only seems so. Access to events_completed should be also
> problematic.
>
> > --CQ
> >
> >
> > > -----Original Message-----
> > > From: Roland Dreier [mailto:rdreier at cisco.com]
> > > Sent: Monday, February 18, 2008 7:24 AM
> > > To: Tang, Changqing
> > > Cc: general at lists.openfabrics.org
> > > Subject: Re: [ofa-general] Another XRC binary compatable
> issue for
> > > different pthread version.
> > >
> > >  >         Here is the ibv_srq structure:
> > >  >
> > >  > struct ibv_srq {
> > >  ...
> > >  >         pthread_cond_t          cond;
> > >
> > >  > On redhat 5 system, since it has a new pthread version,
> > > 'pthread_cond_t' is larger  > than on redhat 4 system.
> > >
> > > Yikes... I don't see any way to handle this without breaking the
> > > libibverbs ABI for all existing binaries, since we have to move
> > > pthread_cond_t out of all exposed structures....
> > >
> > > Any ideas??
> > >
> > >  - R.
> > >
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> --
>                         Gleb.
>