Hi Eric, Thank you for your comments. Eric W. Biederman wrote:I know it might happen some races, but, as Oleg say, it is no problem on the user side. Users cannot realize whether the process forked during kill or after. We can pretend it was forked after kill finished. So I think the change to convert tasklist_lock to rcu_read_lock is reasonable way to avoid the local DOS for kill(-1,sig) case. I think this idea is good for __kill_pgrp_info(), but it is a big change. Thanks, -Atsushi Tsuji --
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