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| author |   Tejun Heo <tj@kernel.org> | 2015-05-22 17:13:35 -0400 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2015-06-02 08:33:35 -0600 |
| commit | 4aa9c692e052cf6db99db62a8fe0543e5c455da7 (patch) | |
| tree | 378d5b44e7ec769dd4dfc9ac5ab2447fdb1f50a4 /include/linux/backing-dev.h | |
| parent | writeback: add @gfp to wb_init() (diff) | |
| download | linux-dev-4aa9c692e052cf6db99db62a8fe0543e5c455da7.tar.xz linux-dev-4aa9c692e052cf6db99db62a8fe0543e5c455da7.zip | |
bdi: separate out congested state into a separate struct
Currently, a wb's (bdi_writeback) congestion state is carried in its
->state field; however, cgroup writeback support will require multiple
wb's sharing the same congestion state. This patch separates out
congestion state into its own struct - struct bdi_writeback_congested.
A new field wb field, wb_congested, points to its associated congested
struct. The default wb, bdi->wb, always points to bdi->wb_congested.
While this patch adds a layer of indirection, it doesn't introduce any
behavior changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/backing-dev.h')
| -rw-r--r-- | include/linux/backing-dev.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 785782034e86..bfdaa18ba0a1 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -167,7 +167,7 @@ static inline int bdi_congested(struct backing_dev_info *bdi, int bdi_bits) { if (bdi->congested_fn) return bdi->congested_fn(bdi->congested_data, bdi_bits); - return (bdi->wb.state & bdi_bits); + return (bdi->wb.congested->state & bdi_bits); } static inline int bdi_read_congested(struct backing_dev_info *bdi) |