• Vladimir Davydov's avatar
    memcg: only account kmem allocations marked as __GFP_ACCOUNT · a9bb7e62
    Vladimir Davydov authored
    Black-list kmem accounting policy (aka __GFP_NOACCOUNT) turned out to be
    fragile and difficult to maintain, because there seem to be many more
    allocations that should not be accounted than those that should be.
    Besides, false accounting an allocation might result in much worse
    consequences than not accounting at all, namely increased memory
    consumption due to pinned dead kmem caches.
    So this patch switches kmem accounting to the white-policy: now only
    those kmem allocations that are marked as __GFP_ACCOUNT are accounted to
    memcg.  Currently, no kmem allocations are marked like this.  The
    following patches will mark several kmem allocations that are known to
    be easily triggered from userspace and therefore should be accounted to
    Signed-off-by: default avatarVladimir Davydov <vdavydov@virtuozzo.com>
    Acked-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
    Acked-by: default avatarMichal Hocko <mhocko@suse.com>
    Cc: Tejun Heo <tj@kernel.org>
    Cc: Greg Thelen <gthelen@google.com>
    Cc: Christoph Lameter <cl@linux.com>
    Cc: Pekka Enberg <penberg@kernel.org>
    Cc: David Rientjes <rientjes@google.com>
    Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
memcontrol.h 21.7 KB