From: Peter Zijlstra <peterz@infradead•org>
To: Topi Miettinen <toiwoton@gmail•com>
Cc: linux-kernel@vger•kernel.org, Jonathan Corbet <corbet@lwn•net>,
Tony Luck <tony.luck@intel•com>,
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Subject: Re: [PATCH 00/14] Present useful limits to user (v2)
Date: Fri, 15 Jul 2016 15:59:56 +0200 [thread overview]
Message-ID: <20160715135956.GA3115@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <28b4b919-4f50-d9f6-c5e1-d1e92ea1ba1c@gmail.com>
On Fri, Jul 15, 2016 at 01:52:48PM +0000, Topi Miettinen wrote:
> On 07/15/16 12:43, Peter Zijlstra wrote:
> > On Fri, Jul 15, 2016 at 01:35:47PM +0300, Topi Miettinen wrote:
> >> Hello,
> >>
> >> There are many basic ways to control processes, including capabilities,
> >> cgroups and resource limits. However, there are far fewer ways to find out
> >> useful values for the limits, except blind trial and error.
> >>
> >> This patch series attempts to fix that by giving at least a nice starting
> >> point from the highwater mark values of the resources in question.
> >> I looked where each limit is checked and added a call to update the mark
> >> nearby.
> >
> > And how is that useful? Setting things to the high watermark is
> > basically the same as not setting the limit at all.
>
> What else would you use, too small limits?
That question doesn't make sense.
What's the point of setting a limit if it ends up being the same as
no-limit (aka unlimited).
If you cannot explain; and you have not so far; what use these values
are, why would we look at the patches.
next prev parent reply other threads:[~2016-07-15 14:00 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-15 10:35 [PATCH 00/14] Present useful limits to user (v2) Topi Miettinen
2016-07-15 10:35 ` [PATCH 09/14] resource limits: track highwater mark of locked memory Topi Miettinen
2016-07-15 15:14 ` Oleg Nesterov
2016-07-15 17:39 ` Topi Miettinen
2016-07-18 15:38 ` Oleg Nesterov
2016-07-15 12:43 ` [PATCH 00/14] Present useful limits to user (v2) Peter Zijlstra
2016-07-15 13:52 ` Topi Miettinen
2016-07-15 13:59 ` Peter Zijlstra [this message]
2016-07-15 16:57 ` Topi Miettinen
2016-07-15 20:54 ` H. Peter Anvin
2016-07-15 13:04 ` Balbir Singh
2016-07-15 16:35 ` Topi Miettinen
2016-07-18 22:05 ` Doug Ledford
2016-07-19 16:53 ` Topi Miettinen
2016-07-15 14:19 ` Richard Weinberger
2016-07-15 17:19 ` Topi Miettinen
2016-07-18 21:25 ` Doug Ledford
2016-08-03 18:20 ` Topi Miettinen
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