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SubjectRe: [PATCH 0/5] blkcg: Limit maximum number of aio requests available for cgroup
Hi Kirill,

On Mon, Dec 04, 2017 at 07:12:51PM +0300, Kirill Tkhai wrote:
> Hi,
>
> this patch set introduces accounting aio_nr and aio_max_nr per blkio cgroup.
> It may be used to limit number of aio requests, which are available for
> a cgroup, and could be useful for containers.
>
> The accounting is hierarchical, and aio contexts, allocated in child cgroup,
> are accounted in parent cgroups too.
>
> Also, new cgroup file "io.aio_nr" is introduced. It's used to set cgroup
> aio requests limit, to show current limit and number of currenly occupied
> requests.

Where are your test cases to check this functionality in the libaio test
suite?

-ben

> Patches 1-3 are refactoring.
> Patch 4 is the place where the accounting actually introduced.
> Patch 5 adds "io.aio_nr" file.
>
> ---
>
> Kirill Tkhai (5):
> aio: Move aio_nr increment to separate function
> aio: Export aio_nr_lock and aio_max_nr initial value to include/linux/aio.h
> blkcg: Add blkcg::blkg_aio_nr and blkcg::blkg_aio_max_nr
> blkcg: Charge aio requests in blkio cgroup hierarchy
> blkcg: Add cgroup file to configure blkcg::blkg_aio_max_nr
>
>
> block/blk-cgroup.c | 88 +++++++++++++++++++++++++-
> fs/aio.c | 151 ++++++++++++++++++++++++++++++++++++++++----
> include/linux/aio.h | 21 ++++++
> include/linux/blk-cgroup.h | 4 +
> 4 files changed, 247 insertions(+), 17 deletions(-)
>
> --
> Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
>

--
"Thought is the essence of where you are now."

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