linux-kernel - Re: [Patch v3] uio_hv_generic: Set event for all channels on the device

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Message-ID: <Z-LvCnIZxZeINR6R@liuwe-devbox-ubuntu-v2.lamzopl0uupeniq2etz1fddiyg.xx.internal.cloudapp.net>
Date: Tue, 25 Mar 2025 17:59:38 +0000
From: Wei Liu <wei.liu@...nel.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Wei Liu <wei.liu@...nel.org>, longli@...uxonhyperv.com,
	"K. Y. Srinivasan" <kys@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Dexuan Cui <decui@...rosoft.com>, linux-hyperv@...r.kernel.org,
	linux-kernel@...r.kernel.org, Long Li <longli@...rosoft.com>
Subject: Re: [Patch v3] uio_hv_generic: Set event for all channels on the
 device

On Tue, Mar 25, 2025 at 12:39:54PM -0400, Greg Kroah-Hartman wrote:
> On Tue, Mar 25, 2025 at 04:10:59PM +0000, Wei Liu wrote:
> > On Mon, Mar 10, 2025 at 03:12:01PM -0700, longli@...uxonhyperv.com wrote:
> > > From: Long Li <longli@...rosoft.com>
> > > 
> > > Hyper-V may offer a non latency sensitive device with subchannels without
> > > monitor bit enabled. The decision is entirely on the Hyper-V host not
> > > configurable within guest.
> > > 
> > > When a device has subchannels, also signal events for the subchannel
> > > if its monitor bit is disabled.
> > > 
> > > This patch also removes the memory barrier when monitor bit is enabled
> > > as it is not necessary. The memory barrier is only needed between
> > > setting up interrupt mask and calling vmbus_set_event() when monitor
> > > bit is disabled.
> > > 
> > > Signed-off-by: Long Li <longli@...rosoft.com>
> > 
> > Greg, are you going to take this patch?
> > 
> > I can take it if you want.
> 
> It's the merge window right now, neither of us should be taking it.  Let
> me look into it after -rc1 is out.

Understood. Thank you for your response.

> 
> thanks,
> 
> greg k-h