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| author | Yu Kuai <yukuai3@huawei.com> | 2021-07-07 03:56:49 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-07-07 17:36:36 +0200 |
| commit | a731763fc479a9c64456e0643d0ccf64203100c9 (patch) | |
| tree | 95e194d57e6bf16885e164006d023d1605204ab9 /fs | |
| parent | block: fix the problem of io_ticks becoming smaller (diff) | |
| download | linux-a731763fc479a9c64456e0643d0ccf64203100c9.tar.xz linux-a731763fc479a9c64456e0643d0ccf64203100c9.zip | |
blk-cgroup: prevent rcu_sched detected stalls warnings while iterating blkgs
We run a test that create millions of cgroups and blkgs, and then trigger
blkg_destroy_all(). blkg_destroy_all() will hold spin lock for a long
time in such situation. Thus release the lock when a batch of blkgs are
destroyed.
blkcg_activate_policy() and blkcg_deactivate_policy() might have the
same problem, however, as they are basically only called from module
init/exit paths, let's leave them alone for now.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20210707015649.1929797-1-yukuai3@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions