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Date:      Wed, 22 Sep 1999 16:05:31 -0700 (PDT)
From:      Alfred Perlstein <bright@wintelcom.net>
To:        Chuck Robey <chuckr@mat.net>
Cc:        Wes Peters <wes@softweyr.com>, "Daniel C. Sobral" <dcs@newsguy.com>, Ivan <Ivan.Djelic@prism.uvsq.fr>, Matthew Dillon <dillon@apollo.backplane.com>, freebsd-hackers@FreeBSD.ORG
Subject:   Re: Out of swap handling and X lockups in 3.2R
Message-ID:  <Pine.BSF.4.05.9909221603040.6368-100000@fw.wintelcom.net>
In-Reply-To: <Pine.BSF.4.10.9909221807180.312-100000@picnic.mat.net>

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On Wed, 22 Sep 1999, Chuck Robey wrote:

> On Wed, 22 Sep 1999, Wes Peters wrote:
> 
> > Chuck Robey wrote:
> > > 
> > > What kind of resources are there that both cause loss of swap AND are
> > > freed up by sleeping a process?
> > 
> > Any of them being consumed by short-lived processes that will run to 
> > completion and exit while everyone else is sleeping.  This assumes such
> > processes exist, of course.
> 
> OK, you wait until some process exits.  Ob course, if none do, then your
> entire machine, all processes that ask for memory, wedge, instead of just
> one.  You can't even start 'kill -9'.

It wouldn't be all that difficult to track how many processes were
affected or for how long they were affected by this and change to
a kill strategy at that point.

-Alfred



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