[petsc-dev] KSP preonly does not support UNPRECONDITIONED

[Barry Smith]

   Lisandro, we have a horrible mix of email and bitbucket comments on this issue. Please see the comments at https://bitbucket.org/petsc/petsc/commits/25c41539b30a2c132c2580a6ea562b0124f49e3e#comment-4869838 and then post any (revised?) opinions.

   Thanks

   Barry


> On Jun 20, 2017, at 3:42 PM, Lisandro Dalcin <dalcinl at gmail.com> wrote:
> 
> On 20 June 2017 at 18:50, Jed Brown <jed at jedbrown.org> wrote:
>> It would be -ksp_norm_type NONE.
>> 
>> PETSc: they want -ksp_norm_type UNPRECONDITIONED for everything.  Should
>> PREONLY be made to "support" UNPRECONDITIONED (and PRECONDITIONED)
>> despite not computing norms?
>> 
> 
> IMHO, yes.
> 
> -- 
> Lisandro Dalcin
> ============
> Research Scientist
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