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Subject[RFC][PATCH 8/9] cgroups: block: cfq: I/O bandwidth controlling subsystem for CGroups based on CFQ
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From: Vasily Tarasov <vtaras@openvz.org>

Configurable cgroup time slice support.

Signed-off-by: Vasily Tarasov <vtaras@openvz.org>

---

--- linux-2.6.25-rc5-mm1/block/cfq-iosched.c.slice 2008-02-15 01:11:45.000000000 -0500
+++ linux-2.6.25-rc5-mm1/block/cfq-iosched.c 2008-02-15 01:12:22.000000000 -0500
@@ -2150,6 +2150,7 @@ SHOW_FUNCTION(cfq_slice_idle_show, cfqd-
SHOW_FUNCTION(cfq_slice_sync_show, cfqd->cfq_slice[1], 1);
SHOW_FUNCTION(cfq_slice_async_show, cfqd->cfq_slice[0], 1);
SHOW_FUNCTION(cfq_slice_async_rq_show, cfqd->cfq_slice_async_rq, 0);
+SHOW_FUNCTION(cfq_cgrp_slice_show, cfqd->cfqio_cgrp_slice, 1);
#undef SHOW_FUNCTION

#define STORE_FUNCTION(__FUNC, __PTR, MIN, MAX, __CONV) \
@@ -2181,6 +2182,7 @@ STORE_FUNCTION(cfq_slice_sync_store, &cf
STORE_FUNCTION(cfq_slice_async_store, &cfqd->cfq_slice[0], 1, UINT_MAX, 1);
STORE_FUNCTION(cfq_slice_async_rq_store, &cfqd->cfq_slice_async_rq, 1,
UINT_MAX, 0);
+STORE_FUNCTION(cfq_cgrp_slice_store, &cfqd->cfqio_cgrp_slice, 1, UINT_MAX, 1);
#undef STORE_FUNCTION

#define CFQ_ATTR(name) \
@@ -2196,6 +2198,7 @@ static struct elv_fs_entry cfq_attrs[] =
CFQ_ATTR(slice_async),
CFQ_ATTR(slice_async_rq),
CFQ_ATTR(slice_idle),
+ CFQ_ATTR(cgrp_slice),
__ATTR_NULL
};


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