From mboxrd@z Thu Jan  1 00:00:00 1970
From: Topi Miettinen <toiwoton@gmail.com>
Subject: Re: [PATCH 00/14] Present useful limits to user (v2)
Date: Fri, 15 Jul 2016 13:52:48 +0000
Message-ID: <28b4b919-4f50-d9f6-c5e1-d1e92ea1ba1c@gmail.com>
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 <20160715124330.GR30154@twins.programming.kicks-ass.net>
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Cc: linux-kernel@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
 Tony Luck <tony.luck@intel.com>, Fenghua Yu <fenghua.yu@intel.com>,
 Alexander Graf <agraf@suse.com>, Paolo Bonzini <pbonzini@redhat.com>,
 =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= <rkrcmar@redhat.com>,
 Benjamin Herrenschmidt <benh@kernel.crashing.org>,
 Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>,
 Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
 "H. Peter Anvin" <hpa@zytor.com>,
 "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@kernel.org>,
 Doug Ledford <dledford@redhat.com>, Sean Hefty <sean.hefty@intel.com>,
 Hal Rosenstock <hal.rosenstock@gmail.com>,
 Mike Marciniszyn <mike.marciniszyn@intel.com>,
 Dennis Dalessandro <dennis.dalessandro@intel.com>,
 Christian Benvenuti <benve@cisco.com>, Dave Goodell <dgoodell@cisco.com>,
 Sudeep Dutt <sudeep.dutt@intel.com>,
 Ashu
To: Peter Zijlstra <peterz@infradead.org>
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In-Reply-To: <20160715124330.GR30154@twins.programming.kicks-ass.net>
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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?

-Topi

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