linux-kernel - Re: EEVDF/vhost regression (bisected to 86bfbb7ce4f6 sched/fair: Add lag based placement)

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Message-ID: <b3fd680c675208370fc4560bb3b4d5b8@linux.ibm.com>
Date: Tue, 19 Mar 2024 09:21:06 +0100
From: Tobias Huschle <huschle@...ux.ibm.com>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Luis Machado <luis.machado@....com>, Jason Wang <jasowang@...hat.com>,
        Abel Wu <wuyun.abel@...edance.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>, kvm@...r.kernel.org,
        virtualization@...ts.linux.dev, netdev@...r.kernel.org,
        nd <nd@....com>
Subject: Re: EEVDF/vhost regression (bisected to 86bfbb7ce4f6 sched/fair: Add
 lag based placement)

On 2024-03-15 11:31, Michael S. Tsirkin wrote:
> On Fri, Mar 15, 2024 at 09:33:49AM +0100, Tobias Huschle wrote:
>> On Thu, Mar 14, 2024 at 11:09:25AM -0400, Michael S. Tsirkin wrote:
>> >
> 
> Could you remind me pls, what is the kworker doing specifically that
> vhost is relying on?

The kworker is handling the actual data moving in memory if I'm not 
mistaking.