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From: Nadia Derbey <Nadia.Derbey@bull.net>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH 6/6] automatic tuning applied to some kernel components
Date: Thu, 15 Feb 2007 09:25:00 +0100	[thread overview]
Message-ID: <45D418DC.5040605@bull.net> (raw)
In-Reply-To: <m1d54bn9lo.fsf@ebiederm.dsl.xmission.com>

Eric W. Biederman wrote:
> Nadia Derbey <Nadia.Derbey@bull.net> writes:
> 
> 
>>But, what do you do with Oracle that's asking maxfiles to be set to 0x10000,
>>while the default value might be enough for a system that's not running Oracle.
>>I'm afraid that giving boot time values to the max_* tunables we will loose all
>>the benefits from /proc (or /sys): it is impossible to anticipate what an OS
>>will be used for. So allowing such things to be changed without having to reboot
>>the machine is in my mind quite a powerful feature we should keep taking
>>adavntage of.
> 
> 
> I'm not saying remove user spaces' ability to set the
> denial-of-service limits.  I'm saying if they need to be frequently
> changed we need to update the default so they are higher by default.
> 
> There really is no cost in moving those values up and down  it is just
> an arbitrary integer used in comparisons.  But if we can make a good
> guess that still catches runaway programs before they kill the machine
> but also allows more programs to work out of the box we are in better
> shape.
> 
OK, happy to see we are on the same wavelength (and sorry for 
misunderstanding what you were saying ;-) )

Regards,
Nadia

  reply	other threads:[~2007-02-15  8:22 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-16  6:15 [RFC][PATCH 0/6] Automatice kernel tunables (AKT) Nadia.Derbey
2007-01-16  6:15 ` [RFC][PATCH 1/6] Tunable structure and registration routines Nadia.Derbey
2007-01-25  0:32   ` Randy Dunlap
2007-01-25 16:26     ` Nadia Derbey
2007-01-25 16:34       ` Randy Dunlap
2007-01-25 17:01         ` Nadia Derbey
2007-01-16  6:15 ` [RFC][PATCH 2/6] auto_tuning activation Nadia.Derbey
2007-01-16  6:15 ` [RFC][PATCH 3/6] tunables associated kobjects Nadia.Derbey
2007-01-16  6:15 ` [RFC][PATCH 4/6] min and max kobjects Nadia.Derbey
2007-01-24 22:41   ` Randy Dunlap
2007-01-25 16:34     ` Nadia Derbey
2007-01-16  6:15 ` [RFC][PATCH 5/6] per namespace tunables Nadia.Derbey
2007-01-24 22:41   ` Randy Dunlap
2007-01-16  6:15 ` [RFC][PATCH 6/6] automatic tuning applied to some kernel components Nadia.Derbey
2007-01-22 19:56   ` Andrew Morton
2007-01-23 14:40     ` Nadia Derbey
2007-02-07 21:18       ` Eric W. Biederman
2007-02-09 12:27         ` Nadia Derbey
2007-02-09 18:35           ` Eric W. Biederman
2007-02-13  9:06             ` Nadia Derbey
2007-02-13 10:10               ` Eric W. Biederman
2007-02-15  7:07                 ` Nadia Derbey
2007-02-15  7:49                   ` Eric W. Biederman
2007-02-15  8:25                     ` Nadia Derbey [this message]
2007-02-14 13:56 Al Boldi

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