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| author | Jiang Biao <jiang.biao2@zte.com.cn> | 2018-04-18 17:37:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-06-20 22:02:43 +0300 |
| commit | 9d5e2d69705fed4ab527f5a283b90ae602f4e0fd (patch) | |
| tree | df8ad81c0c97af93dc023b144de70b0820debc50 /net/sched/sch_api.c | |
| parent | c5b6316c3f5139cbc1d9a37cd6b86bb7be3802bf (diff) | |
| download | linux-9d5e2d69705fed4ab527f5a283b90ae602f4e0fd.tar.xz | |
blkcg: don't hold blkcg lock when deactivating policy
[ Upstream commit 946b81da114b8ba5c74bb01e57c0c6eca2bdc801 ]
As described in the comment of blkcg_activate_policy(),
*Update of each blkg is protected by both queue and blkcg locks so
that holding either lock and testing blkcg_policy_enabled() is
always enough for dereferencing policy data.*
with queue lock held, there is no need to hold blkcg lock in
blkcg_deactivate_policy(). Similar case is in
blkcg_activate_policy(), which has removed holding of blkcg lock in
commit 4c55f4f9ad3001ac1fefdd8d8ca7641d18558e23.
Signed-off-by: Jiang Biao <jiang.biao2@zte.com.cn>
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
CC: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/sched/sch_api.c')
0 files changed, 0 insertions, 0 deletions