Oops, one more thing. On Mon, Apr 08, 2013 at 04:20:59PM +0800, Li Zefan wrote: > - cgrp->id = ida_simple_get(&root->cgroup_ida, 1, 0, GFP_KERNEL); > + cgrp->id = idr_alloc(&root->cgroup_idr, cgrp, 1, 0, GFP_KERNEL);
This will allow lookups to return half-initialized cgroup, which shouldn't happen. Either idr_alloc() should be moved to after initialization of other fields are finished, or it should be called with NULL @ptr with idr_replace() added at the end to install @cgrp. Similarly, the removal path should guarantee that the object is removed from idr *before* its grace period starts. Thanks. -- tejun -- 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/
