From: Peter Zijlstra <peterz@infradead.org>
To: Mel Gorman <mgorman@suse.de>
Cc: ?????? <yun.wang@linux.alibaba.com>,
Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>,
Luis Chamberlain <mcgrof@kernel.org>,
Kees Cook <keescook@chromium.org>,
Iurii Zaikin <yzaikin@google.com>,
Michal Koutn? <mkoutny@suse.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org,
"Paul E. McKenney" <paulmck@linux.ibm.com>,
Randy Dunlap <rdunlap@infradead.org>,
Jonathan Corbet <corbet@lwn.net>
Subject: Re: [PATCH RESEND v8 1/2] sched/numa: introduce per-cgroup NUMA locality info
Date: Fri, 21 Feb 2020 16:47:07 +0100 [thread overview]
Message-ID: <20200221154706.GI18400@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200221142010.GT3420@suse.de>
On Fri, Feb 21, 2020 at 02:20:10PM +0000, Mel Gorman wrote:
> I fully acknowledge that this may have value for sysadmins and may be a
> good enough reason to merge it for environments that typically build and
> configure their own kernels. I doubt that general distributions would
> enable it but that's a guess.
OTOH, many sysadmins seem to 'rely' on BPF scripts and other such fancy
things these days.
( of course, we have the open question on what happens when we break
one of those BPF 'important' scripts ... )
My main reservation with this patch is that it exposes, to userspace, an
ABI that is very hard to interpret and subject to implementation
details.
So while it can be disabled; people who have it enabled might suddenly
complain when we change the meaning/interpretation/whatever of these
magic numbers.
Michael; you seem to have ignored the tracepoint / BPF angle earlier in
this discussion; that is not something that could/would work for you?
next prev parent reply other threads:[~2020-02-21 15:47 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-07 3:34 [PATCH RESEND v8 0/2] sched/numa: introduce numa locality 王贇
2020-02-07 3:35 ` [PATCH RESEND v8 1/2] sched/numa: introduce per-cgroup NUMA locality info 王贇
2020-02-07 3:37 ` 王贇
2020-02-13 2:35 ` 王贇
2020-02-14 15:10 ` Peter Zijlstra
2020-02-17 11:58 ` Mel Gorman
2020-02-17 13:23 ` 王贇
2020-02-17 14:16 ` Mel Gorman
2020-02-18 1:39 ` 王贇
2020-02-21 14:20 ` Mel Gorman
2020-02-21 15:47 ` Peter Zijlstra [this message]
2020-02-24 3:13 ` 王贇
2020-02-24 3:05 ` 王贇
2020-02-21 15:28 ` Peter Zijlstra
2020-02-24 3:09 ` 王贇
2020-02-07 3:35 ` [PATCH RESEND v8 2/2] sched/numa: documentation for per-cgroup numa 王贇
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