[libvirt] [PATCH 3/3] nodedev: update caps before invoking nodedev driver interfaces

Wuzongyong (Euler Dept) cordius.wu at huawei.com
Fri Jan 12 01:39:53 UTC 2018

It is a bit inefficient about my patch, and it is imperfect.
I wish to see a better idea to fix this problem.

And again, thank you for your correction to my patches.

Zongyong Wu

> -----Original Message-----
> From: Erik Skultety [mailto:eskultet at redhat.com]
> Sent: Thursday, January 11, 2018 6:16 PM
> To: Wuzongyong (Euler Dept) <cordius.wu at huawei.com>
> Cc: libvir-list at redhat.com; weijinfen <weijinfen at huawei.com>; Wanzongshun
> (Vincent) <wanzongshun at huawei.com>
> Subject: Re: [PATCH 3/3] nodedev: update caps before invoking nodedev
> driver interfaces
> On Wed, Jan 10, 2018 at 08:14:51PM +0800, Wu Zongyong wrote:
> > Some capabilities of node devices rely on what driver they bound to,
> > and therefore, these capabilities may change when the driver change.
> > So, it is necessary to manually update devices' capabilities each time
> > before nodedev driver interfaces invoked.
> >
> > Signed-off-by: Wu Zongyong <cordius.wu at huawei.com>
> > ---
> Thank you for posting the patch, since I hadn't noticed the problem with
> other APIs until I read it.
> It was a sad realization that a driver change is not reflected by a
> udev/kernel CHANGE event, that would make things much much simpler. I have
> an idea to either make this patch shorter or not needed at all though,
> we'll see when I finish my patch (it's a long-needed refactor). Despite I
> haven't found any major flaws in this patch, let's just put it on hold for
> a while until I finish my investigation/work on my patch and see we can
> really do better here.
> Thanks,
> Erik

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