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authorTejun Heo <tj@kernel.org>2015-05-22 18:23:22 -0400
committerJens Axboe <axboe@fb.com>2015-06-02 08:38:12 -0600
commitdcc25ae76eb7b8ff883eaaab57e30e8f2f085be3 (patch)
tree7fb1d01278ad2b16a1c21ead3e567a3bb7d00c25 /include/trace
parent380c27ca33ebecc9da35aa90c8b3a9154f90aac2 (diff)
writeback: move global_dirty_limit into wb_domain
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>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/writeback.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index 9b876f6cc81a..bec69995968f 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -361,7 +361,7 @@ TRACE_EVENT(global_dirty_state,
__entry->nr_written = global_page_state(NR_WRITTEN);
__entry->background_thresh = background_thresh;
__entry->dirty_thresh = dirty_thresh;
- __entry->dirty_limit = global_dirty_limit;
+ __entry->dirty_limit = global_wb_domain.dirty_limit;
),
TP_printk("dirty=%lu writeback=%lu unstable=%lu "
@@ -463,8 +463,9 @@ TRACE_EVENT(balance_dirty_pages,
unsigned long freerun = (thresh + bg_thresh) / 2;
strlcpy(__entry->bdi, dev_name(bdi->dev), 32);
- __entry->limit = global_dirty_limit;
- __entry->setpoint = (global_dirty_limit + freerun) / 2;
+ __entry->limit = global_wb_domain.dirty_limit;
+ __entry->setpoint = (global_wb_domain.dirty_limit +
+ freerun) / 2;
__entry->dirty = dirty;
__entry->bdi_setpoint = __entry->setpoint *
bdi_thresh / (thresh + 1);