memcg: add per-memcg vmalloc stat

The kvmalloc* allocation functions can fallback to vmalloc allocations
and more often on long running machines.  In addition the kernel does
have __GFP_ACCOUNT kvmalloc* calls.  So, often on long running machines,
the memory.stat does not tell the complete picture which type of memory
is charged to the memcg.  So add a per-memcg vmalloc stat.

[[email protected]: page_memcg() within rcu lock, per Muchun]
  Link: https://lkml.kernel.org/r/[email protected]
[[email protected]: remove cast, per Muchun]
[[email protected]: remove area->page[0] checks and move to page by page accounting per Michal]
  Link: https://lkml.kernel.org/r/[email protected]

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Shakeel Butt <[email protected]>
Acked-by: Roman Gushchin <[email protected]>
Reviewed-by: Muchun Song <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions