On Fri, Sep 22, 2023 at 08:06:41PM -0700, Haitao Huang wrote: > From: Kristen Carlson Accardi <kristen@xxxxxxxxxxxxxxx> > > Add SGX EPC memory, MISC_CG_RES_SGX_EPC, to be a valid resource type > for the misc controller. > > Add per resource type private data so that SGX can store additional per > cgroup data in misc_cg->misc_cg_res[MISC_CG_RES_SGX_EPC]. > > Export misc_cg_root() so the SGX driver can initialize and add those > additional structures to the root misc cgroup as part of initialization > for EPC cgroup support. This bootstraps the same additional > initialization for non-root cgroups in the 'alloc()' callback added in the > previous patch. > > The SGX driver, as the EPC memory provider, will have a background > worker to reclaim EPC pages to make room for new allocations in the same > cgroup when its usage counter reaches near the limit controlled by the > cgroup and its ancestors. Therefore it needs to do a walk from the > current cgroup up to the root. To enable this walk, move parent_misc() > into misc_cgroup.h and make inline to make this function available to > SGX, rename it to misc_cg_parent(), and update kernel/cgroup/misc.c to > use the new name. > > Signed-off-by: Kristen Carlson Accardi <kristen@xxxxxxxxxxxxxxx> > Signed-off-by: Haitao Huang <haitao.huang@xxxxxxxxxxxxxxx> Acked-by: Tejun Heo <tj@xxxxxxxxxx> Thanks. -- tejun
