Re: [PATCH] protect migration/%d etc from sched_setaffinity

From: Andrew Morton <akpm@osdl.org>
To: Joe Korty <joe.korty@ccur.com>
Cc: torvalds@osdl.org, linux-kernel@vger.kernel.org, rml@tech9.net
Subject: Re: [PATCH] protect migration/%d etc from sched_setaffinity
Date: Thu, 31 Jul 2003 16:17:03 -0700	[thread overview]
Message-ID: <20030731161703.210470ea.akpm@osdl.org> (raw)
In-Reply-To: <20030731231154.GB7852@rudolph.ccur.com>

Joe Korty <joe.korty@ccur.com> wrote:
>
> I'd like to be able to write shell scrips that operate on the set of
> /proc/[0-9]* without having to know which of the ever-changing list
> of processes need to be avoided and which not.

Like this?

#!/bin/sh

#
# can_set_affinity pid
#
can_set_affinity()
{
	if [ "$(cat /proc/$1/maps)" != "" ]
	then
		return 0
	fi
	if head -1 /proc/$1/status | egrep "events|migration"
	then
		return 1
	else
		return 0
	fi
}

if can_set_affinity $1
then
	echo can set affinity of pid $1
else
	echo cannot set affinity of pid $1
fi