lkml.org 
[lkml]   [2023]   [Jan]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH -next v3 0/3] blk-cgroup: make sure pd_free_fn() is called in order
Date
From: Yu Kuai <yukuai3@huawei.com>

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.

[1] https://lore.kernel.org/all/20221130132156.2836184-8-linan122@huawei.com/
[2] https://lore.kernel.org/all/aa924294-2f54-1b53-fc6e-e4f8fa019b14@huaweicloud.com/
[3] https://lore.kernel.org/all/20221227125502.541931-1-yukuai1@huaweicloud.com/

Yu Kuai (3):
blk-cgroup: dropping parent refcount after pd_free_fn() is done
blk-cgroup: support to track if policy is online
blk-cgroup: synchronize pd_free_fn() from blkg_free_workfn() and
blkcg_deactivate_policy()

block/blk-cgroup.c | 63 ++++++++++++++++++++++++++++++++----------
block/blk-cgroup.h | 1 +
include/linux/blkdev.h | 1 +
3 files changed, 50 insertions(+), 15 deletions(-)

--
2.31.1

\
 
 \ /
  Last update: 2023-03-26 23:47    [W:0.088 / U:0.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site