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From: Mike Galbraith <efault@gmx.de>
To: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Cc: Ferry Toth <ftoth@telfort.nl>, linux-kernel@vger.kernel.org
Subject: Re: DOS by unprivileged user
Date: Wed, 25 Apr 2018 18:50:33 +0200	[thread overview]
Message-ID: <1524675033.8257.4.camel@gmx.de> (raw)
In-Reply-To: <20180425155459.5a4e40e0@alans-desktop>

On Wed, 2018-04-25 at 15:54 +0100, Alan Cox wrote:
> 
> Classical Unix systems never had this problem because they respond to
> thrashing by ensuring that all processes consumed CPU and made some
> progress. Linux handles it by thrashing itself to dealth while BSD always
> handled it by moving from paging more towards swapping and behaving like
> a swap bound batch machine.

Memcg constrained the gitk hog nicely, forcing it do dig into swap
after hitting its limit.  Dunno if there are any userspace bits that
can use it wisely though.

	-Mike

  parent reply	other threads:[~2018-04-25 16:50 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-19 19:13 Ferry Toth
2018-04-20  4:46 ` Mike Galbraith
2018-04-20  8:39   ` Ferry Toth
2018-04-20 12:37     ` Mike Galbraith
2018-04-22 10:16 ` Pavel Machek
2018-04-22 17:43   ` vcaputo
2018-04-23  0:27     ` Michal Hocko
2018-04-23  7:13       ` Pavel Machek
     [not found] ` <4285098.DEWjdbWF2X@delfion>
     [not found]   ` <1524325275.8078.2.camel@gmx.de>
     [not found]     ` <6057755.ozdVOybsI6@delfion>
2018-04-23  8:04       ` Mike Galbraith
2018-04-25 14:54         ` Alan Cox
2018-04-25 16:21           ` Mike Galbraith
2018-04-25 16:50           ` Mike Galbraith [this message]
2018-04-30 10:00           ` Ferry Toth
2018-04-30 10:35             ` Miguel Ojeda

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