From: Stefan Hajnoczi <stefanha@redhat.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: wangyan <wangyan122@huawei.com>,
linux-fsdevel@vger.kernel.org,
"virtio-fs@redhat.com" <virtio-fs@redhat.com>,
Miklos Szeredi <mszeredi@redhat.com>
Subject: Re: [Virtio-fs] [QUESTION] A performance problem for buffer write compared with 9p
Date: Wed, 21 Aug 2019 17:05:51 +0100 [thread overview]
Message-ID: <20190821160551.GD9095@stefanha-x1.localdomain> (raw)
In-Reply-To: <CAJfpegs8fSLoUaWKhC1543Hoy9821vq8=nYZy-pw1+95+Yv4gQ@mail.gmail.com>
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On Wed, Aug 21, 2019 at 09:51:20AM +0200, Miklos Szeredi wrote:
> On Tue, Aug 20, 2019 at 11:16 AM Stefan Hajnoczi <stefanha@redhat.com> wrote:
> >
> > On Thu, Aug 15, 2019 at 08:30:43AM +0800, wangyan wrote:
> > > Hi all,
> > >
> > > I met a performance problem when I tested buffer write compared with 9p.
> >
> > CCing Miklos, FUSE maintainer, since this is mostly a FUSE file system
> > writeback question.
>
> This is expected. FUSE contains lots of complexity in the buffered
> write path related to preventing DoS caused by the userspace server.
>
> This added complexity, which causes the performance issue, could be
> disabled in virtio-fs, since the server lives on a different kernel
> than the filesystem.
>
> I'll do a patch..
Great, thanks! Maybe wangyan can try your patch to see how the numbers
compare to 9P.
Stefan
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next prev parent reply other threads:[~2019-08-21 16:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-15 0:30 [QUESTION] A performance problem for buffer write compared with 9p wangyan
2019-08-15 0:56 ` Gao Xiang
2019-08-20 9:16 ` [Virtio-fs] " Stefan Hajnoczi
2019-08-21 7:51 ` Miklos Szeredi
2019-08-21 16:05 ` Stefan Hajnoczi [this message]
2019-08-22 0:59 ` wangyan
2019-08-22 11:43 ` Miklos Szeredi
2019-08-22 12:48 ` wangyan
2019-08-22 13:07 ` Miklos Szeredi
2019-08-22 13:17 ` wangyan
2019-08-22 13:29 ` Miklos Szeredi
2019-08-22 14:02 ` Miklos Szeredi
[not found] ` <fd7a2791-d95c-3bd9-e387-b8778a9eca83@huawei.com>
2019-08-26 12:39 ` Miklos Szeredi
2019-08-28 0:57 ` wangyan
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