Hi Andrew, any chance for this patchset to be queued for 3.11? On 2013/6/14 9:53, Li Zefan wrote: > Hi Andrew, > > All the patches in this patchset has been acked by Michal and Kamezawa-san, > and > it's ready to be merged into -mm. > > I have another pending patchset that kills css_id, which depends on this one. > > > Changes since v3: > - rebased against mmotm 2013-06-06-16-19 > - changed wmb() to smp_wmb() and moved it to memcg_kmem_mark_dead() and added > more comment. > > Changes since v2: > > - rebased against 3.10-rc1 > - collected some acks > - the two memcg bug fixes has been merged into mainline > - the cgroup core patch has been merged into mainline > > Changes since v1: > > - wrote better changelog and added acked-by and reviewed-by tags > - revised some comments as suggested by Michal > - added a wmb() in kmem_cgroup_css_offline(), pointed out by Michal > - fixed a bug which causes a css_put() never be called > > > Now memcg has its own refcnt, so when a cgroup is destroyed, the memcg can > still be alive. This patchset converts memcg to always use css_get/put, so > memcg will have the same life cycle as its corresponding cgroup. > > The historical reason that memcg didn't use css_get in some cases, is that > cgroup couldn't be removed if there're still css refs. The situation has > changed so that rmdir a cgroup will succeed regardless css refs, but won't > be freed until css refs goes down to 0. > > Since the introduction of kmemcg, the memcg refcnt handling grows even more > complicated. This patchset greately simplifies memcg's life cycle management. > > Also, after those changes, we can convert memcg to use cgroup->id, and then > we can kill css_id. > > Li Zefan (7): > memcg: use css_get() in sock_update_memcg() > memcg: don't use mem_cgroup_get() when creating a kmemcg cache > memcg: use css_get/put when charging/uncharging kmem > memcg: use css_get/put for swap memcg > memcg: don't need to get a reference to the parent > memcg: kill memcg refcnt > memcg: don't need to free memcg via RCU or workqueue > > Michal Hocko (2): > Revert "memcg: avoid dangling reference count in creation failure." > memcg, kmem: fix reference count handling on the error path > > mm/memcontrol.c | 208 > +++++++++++++++++++++----------------------------------- > 1 file changed, 77 insertions(+), 131 deletions(-) >
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