Re: [PATCH] virtio_blk: set the default scheduler to none

[Michael S. Tsirkin]

On Wed, Dec 27, 2023 at 03:26:30PM +0800, Li Feng wrote:
> 
> 
> > On Dec 26, 2023, at 23:38, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote:
> > 
> > On Tue, Dec 26, 2023 at 05:01:40PM +0800, Li Feng wrote:
> >> I don't have ideas right now to answer Christoph/Paolo's question.
> > 
> > Paolo did some testing on this thread and posted some concerns.
> > Do you disagree with his analysis?
> 
> Paolo gave a very detailed data analysis. Indeed, in some low queue depth
> scenarios, the data dropped somewhat. However, I suspect that it may be 
> caused by other problems (such as test fluctuations) rather than the benefits 
> brought by deadline. 

Maybe. I think it would be up to you to prove this then.


> BTW, I think 128 queue depth test is a very important and common performance
> test item for storage devices.
> 
> Thanks,
> Li
> 
> > 
> > -- 
> > MST
> >