On 2014/4/25 5:02, Tejun Heo wrote: > Until now, cgroup->id has been used to identify all the associated > csses and css_from_id() takes cgroup ID and returns the matching css > by looking up the cgroup and then dereferencing the css associated > with it; however, now that the lifetimes of cgroup and css are > separate, this is incorrect and breaks on the unified hierarchy when a > controller is disabled and enabled back again before the previous > instance is released. > > This patch adds css->id which is a subsystem-unique ID and converts > css_from_id() to look up by the new css->id instead. memcg is the > only user of css_from_id() and also converted to use css->id instead. >
netprio_cgroup also needs to be updated. > For traditional hierarchies, this shouldn't make any functional > difference. > > Signed-off-by: Tejun Heo <t...@kernel.org> > Cc: Johannes Weiner <han...@cmpxchg.org> > Cc: Michal Hocko <mho...@suse.cz> > Cc: Jianyu Zhan <nasa4...@gmail.com> > --- > include/linux/cgroup.h | 9 ++++++++ > kernel/cgroup.c | 59 > ++++++++++++++++++++++++++++++++------------------ > mm/memcontrol.c | 4 ++-- > 3 files changed, 49 insertions(+), 23 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
