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From: Nathan Lynch <nathanl@linux.ibm.com>
To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Subject: Re: [PATCH v4 0/5] Early node associativity
In-Reply-To: <20190913110945.12564-1-srikar@linux.vnet.ibm.com>
References: <20190913110945.12564-1-srikar@linux.vnet.ibm.com>
Date: Wed, 02 Oct 2019 12:59:03 -0500
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Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>,
 Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>,
 linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
 Nicholas Piggin <npiggin@gmail.com>
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 <linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org>

Hi Srikar,

Srikar Dronamraju <srikar@linux.vnet.ibm.com> writes:
> Abdul reported  a warning on a shared lpar.
> "WARNING: workqueue cpumask: online intersect > possible intersect".
> This is because per node workqueue possible mask is set very early in the
> boot process even before the system was querying the home node
> associativity. However per node workqueue online cpumask gets updated
> dynamically. Hence there is a chance when per node workqueue online cpumask
> is a superset of per node workqueue possible mask.

Sorry for the delay in following up on these. The series looks good to
me, and I've given it a little testing with LPM and DLPAR. I've also
verified that the cpu assignments occur early as intended on an LPAR
where that workqueue warning had been triggered.