Re: [PATCH] Drivers: hv: vmbus: Add /sys/bus/vmbus/supported_features

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On Tue, Jan 05, 2021 at 11:04:15PM +0000, Dexuan Cui wrote:
> > From: Wei Liu <wei.liu@xxxxxxxxxx>
> > Sent: Tuesday, January 5, 2021 4:58 AM
> > > ...
> > >  Documentation/ABI/stable/sysfs-bus-vmbus |  7 +++++++
> > >  drivers/hv/vmbus_drv.c                   | 20
> > ++++++++++++++++++++
> > >  2 files changed, 27 insertions(+)
> > >
> > > diff --git a/Documentation/ABI/stable/sysfs-bus-vmbus
> > b/Documentation/ABI/stable/sysfs-bus-vmbus
> > > index c27b7b89477c..3ba765ae6695 100644
> > > --- a/Documentation/ABI/stable/sysfs-bus-vmbus
> > > +++ b/Documentation/ABI/stable/sysfs-bus-vmbus
> > > @@ -1,3 +1,10 @@
> > > +What:		/sys/bus/vmbus/supported_features
> > > +Date:		Dec 2020
> > > +KernelVersion:	5.11
> > 
> > Too late for 5.11 now.
> 
> The patch was posted 2 weeks ago, before 5.11-rc1. :-)
> 
> If possible, we still want this patch to be in 5.11, because:
> 1. The patch is small and IMO pretty safe.
> 2. The patch adds new code and doesn't really change any old code.
> 3. The patch adds a new sys file, which is needed by some
> user space tool to auto-setup the configuration for hibernation.
> We'd like to integrate the patch into the Linux distros ASAP and
> as we know some distros don't accept a patch if it's not in the
> mainline.
> 
> So, if the patch itself looks good, IMO it would be better to be
> in v5.11 rather than in v5.12, which will need extra time of
> 2~3 months.
> 
> That said, I don't know if there is any hard rule in regard of
> the timing here. If there is, then v5.12 is OK to me. :-)
>  

By the time you posted this (Dec 22), 5.11 was already more or less
"frozen". Linus wanted -next patches to be merged before Christmas.

The way I see it this is a new sysfs interface so I think this is
something new, which is for 5.12.

Do you think this should be considered a bug fix?

Wei.

> > Given this is a list of strings, do you want to enumerate them in a
> > Values section or the Description section?
> > 
> > Wei.
> 
> Currently there is only one possible string "hibernation".
> Not sure if we would need to add more strings in future, but yes
> it's a good idea to list the string in a "Value" section. 
> 
> Will post v2 shortly.
> 
> Thanks,
> -- Dexuan



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