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

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To: Li Feng <fengli@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH] virtio_blk: set the default scheduler to none
From: Jason Wang <jasowang@xxxxxxxxxx>
Date: Thu, 7 Dec 2023 14:02:36 +0800
Cc: Jens Axboe <axboe@xxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Stefan Hajnoczi <stefanha@xxxxxxxxxx>, Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>, "open list:BLOCK LAYER" <linux-block@xxxxxxxxxxxxxxx>, open list <linux-kernel@xxxxxxxxxxxxxxx>, "open list:VIRTIO BLOCK AND SCSI DRIVERS" <virtualization@xxxxxxxxxxxxxxx>
In-reply-to: <20231207043118.118158-1-fengli@smartx.com>
References: <20231207043118.118158-1-fengli@smartx.com>

On Thu, Dec 7, 2023 at 12:33 PM Li Feng <fengli@xxxxxxxxxx> wrote:
>
> virtio-blk is generally used in cloud computing scenarios, where the
> performance of virtual disks is very important. The mq-deadline scheduler
> has a big performance drop compared to none with single queue.

At least you can choose the scheduler based on if mq is supported or not?

Thanks

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References:
- [PATCH] virtio_blk: set the default scheduler to none
  - From: Li Feng

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