[PATCH -next v2 5/5] block, bfq: do not idle if only one cgroup is activated

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Now that root group is counted into 'num_groups_with_pending_reqs',
'num_groups_with_pending_reqs > 0' is always true in
bfq_asymmetric_scenario().

Thus change the condition to 'num_groups_with_pending_reqs > 1'.

On the other hand, now that 'num_groups_with_pending_reqs' represents
how many groups have pending requests, this change can enable concurrent
sync io is only on cgroup is activated.

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
 block/bfq-iosched.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 39abcd95df8e..7d9f94882f8e 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -846,7 +846,7 @@ static bool bfq_asymmetric_scenario(struct bfq_data *bfqd,
 
 	return varied_queue_weights || multiple_classes_busy
 #ifdef CONFIG_BFQ_GROUP_IOSCHED
-	       || bfqd->num_groups_with_pending_reqs > 0
+	       || bfqd->num_groups_with_pending_reqs > 1
 #endif
 		;
 }
-- 
2.31.1




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]     [Monitors]

  Powered by Linux