Re: [PATCH stable 4.6+] radix-tree: account nodes to memcg only if explicitly requested

[Greg KH]

On Tue, Aug 02, 2016 at 03:45:34PM +0300, Vladimir Davydov wrote:
> Radix trees may be used not only for storing page cache pages, so
> unconditionally accounting radix tree nodes to the current memory cgroup
> is bad: if a radix tree node is used for storing data shared among
> different cgroups we risk pinning dead memory cgroups forever. So let's
> only account radix tree nodes if it was explicitly requested by passing
> __GFP_ACCOUNT to INIT_RADIX_TREE. Currently, we only want to account
> page cache entries, so mark mapping->page_tree so.
> 
> Signed-off-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> Acked-by: Michal Hocko <mhocko@xxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>  [4.6+]
> ---
>  fs/inode.c       |  2 +-
>  lib/radix-tree.c | 14 ++++++++++----
>  2 files changed, 11 insertions(+), 5 deletions(-)

Is this patch in Linus's tree already?

confused,

greg k-h