[petsc-dev] [petsc-users] Multiple solves with PCMG fail

[Jed Brown]

Mark Adams <mfadams at lbl.gov> writes:

> On Wed, Oct 22, 2014 at 2:25 AM, Jed Brown <jed at jedbrown.org> wrote:
>
>> Barry Smith <bsmith at mcs.anl.gov> writes:
>>
>> >   Jed
>> >
>> >     There are some additional issues when the GMRES runs for zero
>> iterations in computing eigenvalues for Cheby.
>>
>> Hmm, what is right?  Suggest that the user set
>> -ksp_chebyshev_estimate_eigenvalues_random?  Automatically fall back to
>> that?
>>
>>
> Are you implying that PETSc is using the RHS to compute the spectra for
> cheby?

That is the default, yes.
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