From: Zefan Li Date: Fri, 19 Sep 2014 08:51:00 +0000 (+0800) Subject: cgroup: remove CGRP_RELEASABLE flag X-Git-Tag: fixes-against-v3.18-rc2~135^2~3 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a25eb52e81a40e986179a790fbb5a1f02f482b7a;p=pandora-kernel.git cgroup: remove CGRP_RELEASABLE flag We call put_css_set() after setting CGRP_RELEASABLE flag in cgroup_task_migrate(), but in other places we call it without setting the flag. I don't see the necessity of this flag. Moreover once the flag is set, it will never be cleared, unless writing to the notify_on_release control file, so it can be quite confusing if we look at the output of debug.releasable. # mount -t cgroup -o debug xxx /cgroup # mkdir /cgroup/child # cat /cgroup/child/debug.releasable 0 <-- shows 0 though the cgroup is empty # echo $$ > /cgroup/child/tasks # cat /cgroup/child/debug.releasable 0 # echo $$ > /cgroup/tasks && echo $$ > /cgroup/child/tasks # cat /proc/child/debug.releasable 1 <-- shows 1 though the cgroup is not empty This patch removes the flag, and now debug.releasable shows if the cgroup is empty or not. Signed-off-by: Zefan Li Signed-off-by: Tejun Heo --- Reading git-diff-tree failed