| Message ID | 20241011014724.2199182-1-xiuhong.wang@unisoc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Revert "blk-throttle: Fix IO hang for a corner case" | expand |
Hello. On Fri, Oct 11, 2024 at 09:47:24AM GMT, Xiuhong Wang <xiuhong.wang@unisoc.com> wrote: > This reverts commit 5b7048b89745c3c5fb4b3080fb7bced61dba2a2b. > > The throtl_adjusted_limit function was removed after > commit bf20ab538c81 ("blk-throttle: remove > CONFIG_BLK_DEV_THROTTLING_LOW"), so the problem of not being > able to scale after setting bps or iops to 1 will not occur. > So revert this commit that bps/iops can be set to 1. What is the use case where the difference between 1 or 2 matters? (Unless this is meant as a cleanup, then it makes sense to me.) Thanks Michal
Hi Michal, Remove this patch to make the code clearer and easier to understand. Michal Koutný <mkoutny@suse.com> 于2024年10月15日周二 00:45写道： > > Hello. > > On Fri, Oct 11, 2024 at 09:47:24AM GMT, Xiuhong Wang <xiuhong.wang@unisoc.com> wrote: > > This reverts commit 5b7048b89745c3c5fb4b3080fb7bced61dba2a2b. > > > > The throtl_adjusted_limit function was removed after > > commit bf20ab538c81 ("blk-throttle: remove > > CONFIG_BLK_DEV_THROTTLING_LOW"), so the problem of not being > > able to scale after setting bps or iops to 1 will not occur. > > So revert this commit that bps/iops can be set to 1. > > What is the use case where the difference between 1 or 2 matters? > (Unless this is meant as a cleanup, then it makes sense to me.) > > Thanks > Michal
在 2024/10/11 9:47, Xiuhong Wang 写道: > This reverts commit 5b7048b89745c3c5fb4b3080fb7bced61dba2a2b. > > The throtl_adjusted_limit function was removed after > commit bf20ab538c81 ("blk-throttle: remove > CONFIG_BLK_DEV_THROTTLING_LOW"), so the problem of not being > able to scale after setting bps or iops to 1 will not occur. > So revert this commit that bps/iops can be set to 1. > > Cc: Baolin Wang <baolin.wang@linux.alibaba.com> > Cc: Yu Kuai <yukuai3@huawei.com> > Signed-off-by: Xiuhong Wang <xiuhong.wang@unisoc.com> > Signed-off-by: Zhiguo Niu <zhiguo.niu@unisoc.com> > --- > block/blk-throttle.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > LGRM Reviewed-by: Yu Kuai <yukuai3@huawei.com> > diff --git a/block/blk-throttle.c b/block/blk-throttle.c > index 2c4192e12efa..443d1f47c2ce 100644 > --- a/block/blk-throttle.c > +++ b/block/blk-throttle.c > @@ -1485,13 +1485,13 @@ static ssize_t tg_set_limit(struct kernfs_open_file *of, > goto out_finish; > > ret = -EINVAL; > - if (!strcmp(tok, "rbps") && val > 1) > + if (!strcmp(tok, "rbps")) > v[0] = val; > - else if (!strcmp(tok, "wbps") && val > 1) > + else if (!strcmp(tok, "wbps")) > v[1] = val; > - else if (!strcmp(tok, "riops") && val > 1) > + else if (!strcmp(tok, "riops")) > v[2] = min_t(u64, val, UINT_MAX); > - else if (!strcmp(tok, "wiops") && val > 1) > + else if (!strcmp(tok, "wiops")) > v[3] = min_t(u64, val, UINT_MAX); > else > goto out_finish; >
On Fri, Oct 11, 2024 at 09:47:24AM +0800, Xiuhong Wang wrote: > This reverts commit 5b7048b89745c3c5fb4b3080fb7bced61dba2a2b. > > The throtl_adjusted_limit function was removed after > commit bf20ab538c81 ("blk-throttle: remove > CONFIG_BLK_DEV_THROTTLING_LOW"), so the problem of not being > able to scale after setting bps or iops to 1 will not occur. > So revert this commit that bps/iops can be set to 1. > > Cc: Baolin Wang <baolin.wang@linux.alibaba.com> > Cc: Yu Kuai <yukuai3@huawei.com> > Signed-off-by: Xiuhong Wang <xiuhong.wang@unisoc.com> > Signed-off-by: Zhiguo Niu <zhiguo.niu@unisoc.com> Please update the description to clarify that it's mostly a cleanup. Other than that: Acked-by: Tejun Heo <tj@kernel.org> Thanks.
diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 2c4192e12efa..443d1f47c2ce 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -1485,13 +1485,13 @@ static ssize_t tg_set_limit(struct kernfs_open_file *of, goto out_finish; ret = -EINVAL; - if (!strcmp(tok, "rbps") && val > 1) + if (!strcmp(tok, "rbps")) v[0] = val; - else if (!strcmp(tok, "wbps") && val > 1) + else if (!strcmp(tok, "wbps")) v[1] = val; - else if (!strcmp(tok, "riops") && val > 1) + else if (!strcmp(tok, "riops")) v[2] = min_t(u64, val, UINT_MAX); - else if (!strcmp(tok, "wiops") && val > 1) + else if (!strcmp(tok, "wiops")) v[3] = min_t(u64, val, UINT_MAX); else goto out_finish;
This reverts commit 5b7048b89745c3c5fb4b3080fb7bced61dba2a2b. The throtl_adjusted_limit function was removed after commit bf20ab538c81 ("blk-throttle: remove CONFIG_BLK_DEV_THROTTLING_LOW"), so the problem of not being able to scale after setting bps or iops to 1 will not occur. So revert this commit that bps/iops can be set to 1. Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Yu Kuai <yukuai3@huawei.com> Signed-off-by: Xiuhong Wang <xiuhong.wang@unisoc.com> Signed-off-by: Zhiguo Niu <zhiguo.niu@unisoc.com> --- block/blk-throttle.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)