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authorTejun Heo <tj@kernel.org>2015-08-19 00:55:23 +0300
committerJens Axboe <axboe@fb.com>2015-08-19 01:49:17 +0300
commitf12c74cab1635d67077ce8cc40da88b57980f637 (patch)
tree250f9f3c6aa271f8a6899da86598666f67bce20c /block/cfq-iosched.c
parent24bdb8ef068ebdc2a57ce715f0ab22d5da32832a (diff)
downloadlinux-f12c74cab1635d67077ce8cc40da88b57980f637.tar.xz
blkcg: make blkg_[rw]stat_recursive_sum() to be able to index into blkcg_gq
Currently, blkg_[rw]stat_recursive_sum() assume that the target counter is located in pd (blkg_policy_data); however, some counters are planned to be moved to blkg (blkcg_gq). This patch updates blkg_[rw]stat_recursive_sum() to take blkg and blkg_policy pointers instead of pd. If policy is NULL, it indexes into blkg. If non-NULL, into the blkg's pd of the policy. The existing usages are updated to maintain the current behaviors. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/cfq-iosched.c')
-rw-r--r--block/cfq-iosched.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 71e55c91ee98..e861cc1ebd62 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1886,16 +1886,16 @@ static int cfqg_print_rwstat(struct seq_file *sf, void *v)
static u64 cfqg_prfill_stat_recursive(struct seq_file *sf,
struct blkg_policy_data *pd, int off)
{
- u64 sum = blkg_stat_recursive_sum(pd, off);
-
+ u64 sum = blkg_stat_recursive_sum(pd_to_blkg(pd),
+ &blkcg_policy_cfq, off);
return __blkg_prfill_u64(sf, pd, sum);
}
static u64 cfqg_prfill_rwstat_recursive(struct seq_file *sf,
struct blkg_policy_data *pd, int off)
{
- struct blkg_rwstat sum = blkg_rwstat_recursive_sum(pd, off);
-
+ struct blkg_rwstat sum = blkg_rwstat_recursive_sum(pd_to_blkg(pd),
+ &blkcg_policy_cfq, off);
return __blkg_prfill_rwstat(sf, pd, &sum);
}