I think using the parameters is the best choice 
sub routine
{
   my ($hashref1, $hashref2) = @_;

   # don't convert them back to hashes
   # work with the refs instead, so you won't have to 
   # set @_ at the end
}

my %first, %second;

routine(\%first, \%second);

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In reply to Re: Returning two hashes from a sub? by esskar
in thread Returning two hashes from a sub? by matija

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