writeback: move global_dirty_limit into wb_domain

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This patch is a part of the series to define wb_domain which
represents a domain that wb's (bdi_writeback's) belong to and are
measured against each other in.  This will enable IO backpressure
propagation for cgroup writeback.

global_dirty_limit exists to regulate the global dirty threshold which
is a property of the wb_domain.  This patch moves hard_dirty_limit,
dirty_lock, and update_time into wb_domain.

This is pure reorganization and doesn't introduce any behavioral
changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jan Kara <jack@suse.cz>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Greg Thelen <gthelen@google.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

...

This commit is contained in:

Tejun Heo 2015-05-22 18:23:22 -04:00 • committed by Jens Axboe

parent 380c27ca33

commit dcc25ae76e

4 changed files with 44 additions and 28 deletions

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17

include/linux/writeback.h

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7

include/trace/events/writeback.h

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