If you are on Linux with CFQ/ionice installed, it is easy to invoke ionice through the shell: 
my $sched_class = 3;
my $pid = 89;
system "/usr/bin/ionice -c$sched_class -p$pid";

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-Mark

In reply to Re: CFQ / ionice ? by kvale
in thread CFQ / ionice ? by pileofrogs

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