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| author |   Tejun Heo <tj@kernel.org> | 2019-08-26 09:06:55 -0700 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2019-08-27 09:22:38 -0600 |
| commit | d62241c7a406f0680d702bd974f6f17e28ab8e5d (patch) | |
| tree | 284d9d72f978a881034a791a8692994252b6b93b /include/linux/writeback.h | |
| parent | writeback: Separate out wb_get_lookup() from wb_get_create() (diff) | |
| download | wireguard-linux-d62241c7a406f0680d702bd974f6f17e28ab8e5d.tar.xz wireguard-linux-d62241c7a406f0680d702bd974f6f17e28ab8e5d.zip | |
writeback, memcg: Implement cgroup_writeback_by_id()
Implement cgroup_writeback_by_id() which initiates cgroup writeback
from bdi and memcg IDs. This will be used by memcg foreign inode
flushing.
v2: Use wb_get_lookup() instead of wb_get_create() to avoid creating
spurious wbs.
v3: Interpret 0 @nr as 1.25 * nr_dirty to implement best-effort
flushing while avoding possible livelocks.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/writeback.h')
| -rw-r--r-- | include/linux/writeback.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h index 8945aac31392..a19d845dd7eb 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -217,6 +217,8 @@ void wbc_attach_and_unlock_inode(struct writeback_control *wbc, void wbc_detach_inode(struct writeback_control *wbc); void wbc_account_cgroup_owner(struct writeback_control *wbc, struct page *page, size_t bytes); +int cgroup_writeback_by_id(u64 bdi_id, int memcg_id, unsigned long nr_pages, + enum wb_reason reason, struct wb_completion *done); void cgroup_writeback_umount(void); /** |