Re: [RFC][PATCH 00/26] sched/numa
[Posted March 21, 2012 by corbet]
| From: |
| Christoph Lameter <cl-AT-linux.com> |
| To: |
| Ingo Molnar <mingo-AT-kernel.org> |
| Subject: |
| Re: [RFC][PATCH 00/26] sched/numa |
| Date: |
| Mon, 19 Mar 2012 15:43:09 -0500 (CDT) |
| Message-ID: |
| <alpine.DEB.2.00.1203191536390.23632@router.home> |
| Cc: |
| Andrea Arcangeli <aarcange-AT-redhat.com>,
Peter Zijlstra <a.p.zijlstra-AT-chello.nl>, Avi Kivity <avi-AT-redhat.com>,
Linus Torvalds <torvalds-AT-linux-foundation.org>,
Andrew Morton <akpm-AT-linux-foundation.org>,
Thomas Gleixner <tglx-AT-linutronix.de>, Ingo Molnar <mingo-AT-elte.hu>,
Paul Turner <pjt-AT-google.com>, Suresh Siddha <suresh.b.siddha-AT-intel.com>,
Mike Galbraith <efault-AT-gmx.de>,
"Paul E. McKenney" <paulmck-AT-linux.vnet.ibm.com>,
Lai Jiangshan <laijs-AT-cn.fujitsu.com>, Dan Smith <danms-AT-us.ibm.com>,
Bharata B Rao <bharata.rao-AT-gmail.com>,
Lee Schermerhorn <Lee.Schermerhorn-AT-hp.com>, Rik van Riel <riel-AT-redhat.com>,
Johannes Weiner <hannes-AT-cmpxchg.org>, linux-kernel-AT-vger.kernel.org,
linux-mm-AT-kvack.org |
| Archive‑link: | |
Article |
On Mon, 19 Mar 2012, Ingo Molnar wrote:
> > I wonder how we can verify that the automatic migration
> > schemes are a real benefit to the application? We have a
> > history of developing a kernel that decreases in performance
> > as development proceeds. How can we make sure that these
> > schemes are actually beneficial overall for all loads and do
> > not cause regressions elsewhere? [...]
>
> The usual way?
Which is merge after a couple of benchmarks and then deal with the
regressions for a couple of years?
Patch verification occurs in an artificial bubble of software run/known by
kernel developers. It can take years before the code is exposed to
real life situations.
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