linux-kernel - Re: [PATCH 10/18] virtiofs: Do not use device managed mem for virtio_fs and virtio_fs

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Message-ID: <20190906105658.GR5900@stefanha-x1.localdomain>
Date:   Fri, 6 Sep 2019 11:56:58 +0100
From:   Stefan Hajnoczi <stefanha@...hat.com>
To:     Vivek Goyal <vgoyal@...hat.com>
Cc:     linux-fsdevel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, miklos@...redi.hu,
        linux-kernel@...r.kernel.org, virtio-fs@...hat.com,
        dgilbert@...hat.com, mst@...hat.com
Subject: Re: [PATCH 10/18] virtiofs: Do not use device managed mem for
 virtio_fs and virtio_fs_vq

On Thu, Sep 05, 2019 at 03:48:51PM -0400, Vivek Goyal wrote:
> These data structures should go away when virtio_fs object is going away.
> When deivce is going away, we need to just make sure virtqueues can go
> away and after that none of the code accesses vq and all the requests
> get error.
> 
> So allocate memory for virtio_fs and virtio_fs_vq normally and free it
> at right time.
> 
> This patch still frees up memory during device remove time. A later patch
> will make virtio_fs object reference counted and this memory will be
> freed when last reference to object is dropped.
> 
> Signed-off-by: Vivek Goyal <vgoyal@...hat.com>
> ---
>  fs/fuse/virtio_fs.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@...hat.com>

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