linux-kernel - Re: [PATCH v5 0/4] virtio-fs: shared file system for virtual machines

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Message-ID: <CAJfpegtmvi7pkiJe+1cHMbkx2rJEi7LOAaBMEyC0DaNm7uW3bQ@mail.gmail.com>
Date:   Thu, 12 Sep 2019 09:34:52 +0200
From:   Miklos Szeredi <miklos@...redi.hu>
To:     Vivek Goyal <vgoyal@...hat.com>
Cc:     Miklos Szeredi <mszeredi@...hat.com>,
        virtualization@...ts.linux-foundation.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        "Dr. David Alan Gilbert" <dgilbert@...hat.com>
Subject: Re: [PATCH v5 0/4] virtio-fs: shared file system for virtual machines

On Wed, Sep 11, 2019 at 4:53 PM Vivek Goyal <vgoyal@...hat.com> wrote:
>
> On Tue, Sep 10, 2019 at 05:12:02PM +0200, Miklos Szeredi wrote:
> > Git tree for this version is available here:
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git#virtiofs-v5
> >
> > Only post patches that actually add virtiofs (virtiofs-v5-base..virtiofs-v5).
> >
> > I've folded the series from Vivek and fixed a couple of TODO comments
> > myself.  AFAICS two issues remain that need to be resolved in the short
> > term, one way or the other: freeze/restore and full virtqueue.
>
> Hi Miklos,
>
> We are already handling full virtqueue by waiting a bit and retrying.
> I think TODO in virtio_fs_enqueue_req() is stale. Caller already
> handles virtqueue full situation by retrying.

Ah.

>
> Havind said that, this could be improved by using some sort of wait
> queue or completion privimitve.

Yeah, the request queuing can be cleaned up in several ways.  But I
think that we might postpone that till after merging with mainline.

Thanks,
Miklos