* [PATCH] blk-throttle: allow configure 0 for some settings
@ 2017-10-11 20:22 Shaohua Li
0 siblings, 0 replies; only message in thread
From: Shaohua Li @ 2017-10-11 20:22 UTC (permalink / raw)
To: linux-block; +Cc: Jens Axboe, Kernel-team
For io.low, latency target 0 is legit. 0 for rbps/wbps/rios/wios is ok
too as long as not all of them are 0.
Signed-off-by: Shaohua Li <shli@fb.com>
---
block/blk-throttle.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 0fea76a..ee6d7b0 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -1632,7 +1632,7 @@ static ssize_t tg_set_limit(struct kernfs_open_file *of,
goto out_finish;
ret = -ERANGE;
- if (!val)
+ if (!val && off != LIMIT_LOW)
goto out_finish;
ret = -EINVAL;
--
2.9.5
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2017-10-11 20:22 [PATCH] blk-throttle: allow configure 0 for some settings Shaohua Li
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