Add writeback_control fields to differentiate between bdi-wide and
per-cgroup writeback. Cgroup writeback is also able to differentiate
between writing inodes isolated to a particular cgroup and inodes shared
by multiple cgroups.
Signed-off-by: Greg Thelen <gthelen@xxxxxxxxxx>
---
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 d10d133..4f5c0d2 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -47,6 +47,8 @@ struct writeback_control {
unsigned for_reclaim:1; /* Invoked from the page allocator */
unsigned range_cyclic:1; /* range_start is cyclic */
unsigned more_io:1; /* more io to be dispatched */
+ unsigned for_cgroup:1; /* enable cgroup writeback */
+ unsigned shared_inodes:1; /* write inodes spanning cgroups */
};
/*
--
1.7.3.1
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