On 1/28/23 11:06 PM, Yu Kuai wrote:

Hi, Jens

在 2023/01/20 2:54, Jens Axboe 写道:

quoted

On 1/19/23 4:03 AM, Yu Kuai wrote:

quoted

From: Yu Kuai <redacted>

Changes in v3:
  - add ack tag from Tejun for patch 1,2
  - as suggested by Tejun, update commit message and comments in patch 3

The problem was found in iocost orignally([1]) that ioc can be freed in
ioc_pd_free(). And later we found that there are more problem in
iocost([2]).

After some discussion, as suggested by Tejun([3]), we decide to fix the
problem that parent pd can be freed before child pd in cgroup layer
first. And the problem in [1] will be fixed later if this patchset is
applied.

Doesn't apply against for-6.3/block (or linux-next or my for-next, for
that matter). Can you resend a tested one against for-6.3/block?

This is weird, I just test latest linux-next, and I can apply this
patchset on the top of following commit:

For latest for-6.3/block, this patch 2 can't be applied because
following commit is not here:

e3ff8887e7db blk-cgroup: fix missing pd_online_fn() while activating policy

But this patch is already merged into 6.2-rc5.

Since I have one more conflict, I think we'll just rebase for-6.3/block
when -rc6 is out, and then it should apply cleanly.

-- 
Jens Axboe