Date: Tue, 9 May 2006 11:04:44 -0400 From: Bill Moran <wmoran@collaborativefusion.com> To: Frank Steinborn <steinex@nognu.de> Cc: nospam@mgedv.net, freebsd-questions@freebsd.org, nvass@teledomenet.gr Subject: Re: kern.randompid: jot generation senseful? Message-ID: <20060509110444.95acb749.wmoran@collaborativefusion.com> In-Reply-To: <20060509141318.88A0FB822@shodan.nognu.de> References: <000a01c67362$f3d1f3d0$01010101@avalon.lan> <200605091622.30492.nvass@teledomenet.gr> <20060509141318.88A0FB822@shodan.nognu.de>
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On Tue, 9 May 2006 16:13:18 +0200 Frank Steinborn <steinex@nognu.de> wrote: > Nikos Vassiliadis wrote: > > Isn't kern.randompid a boolean? TRUE or FALSE? > > No. > > > It is just on or off. 1 means PIDs are random. > > 0 means PIDs are sequential. to be exact, everything > > not being 0, is TRUE. > > That is not true. Peter Pentchev once wrote: > > "The kern.randompid sysctl is not a boolean flag, but an estimate of > the random value that will be added to each newly created pid. For > more information, read the comments in src/sys/kern/kern_fork.c before > the sysctl_kern_randompid() function (around line 150). The function > itself ignores sysctl settings of less than 2." Yes, but constantly changing the setting is unneeded. Simply set it to something large, like 10000, and a random number between 2 and 10000 will be added to the pid of each new child. -- Bill Moran Collaborative Fusion Inc.
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