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authorVivek Goyal <vgoyal@redhat.com>2009-12-03 12:59:48 -0500
committerJens Axboe <jens.axboe@oracle.com>2009-12-03 19:28:52 +0100
commit2868ef7b39490e6b41c2c61cd9a5cd891e778b54 (patch)
treee50e169e984d8bd201de2f73f98e31a65c028feb /block/blk-cgroup.h
parentb1c3576961847da26c91b1e97f226bb66be5fa3f (diff)
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blkio: Some debugging aids for CFQ
o Some debugging aids for CFQ. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-cgroup.h')
-rw-r--r--block/blk-cgroup.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index cd50a2f8733..3573199b298 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -27,12 +27,25 @@ struct blkio_group {
void *key;
struct hlist_node blkcg_node;
unsigned short blkcg_id;
+#ifdef CONFIG_DEBUG_BLK_CGROUP
+ /* Store cgroup path */
+ char path[128];
+#endif
};
#define BLKIO_WEIGHT_MIN 100
#define BLKIO_WEIGHT_MAX 1000
#define BLKIO_WEIGHT_DEFAULT 500
+#ifdef CONFIG_DEBUG_BLK_CGROUP
+static inline char *blkg_path(struct blkio_group *blkg)
+{
+ return blkg->path;
+}
+#else
+static inline char *blkg_path(struct blkio_group *blkg) { return NULL; }
+#endif
+
#ifdef CONFIG_BLK_CGROUP
extern struct blkio_cgroup blkio_root_cgroup;
extern struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup);