From: Greg KH <gregkh@linuxfoundation.org>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: olaf@aepfle.de, kys@exchange.microsoft.com,
sthemmin@microsoft.com, jasowang@redhat.com,
linux-kernel@vger.kernel.org, Stable <stable@vger.kernel.org>,
Michael Kelley <mhkelley@outlook.com>,
marcelo.cerri@canonical.com, apw@canonical.com,
devel@linuxdriverproject.org, vkuznets@redhat.com,
leann.ogasawara@canonical.com
Subject: Re: [PATCH 1/1] Drivers: hv: vmbus: Fix ring buffer signaling
Date: Thu, 29 Mar 2018 09:24:45 +0200 [thread overview]
Message-ID: <20180329072445.GA13733@kroah.com> (raw)
In-Reply-To: <20180328120142.7ba72aa2@xeon-e3>
On Wed, Mar 28, 2018 at 12:01:42PM -0700, Stephen Hemminger wrote:
> On Sun, 4 Mar 2018 22:24:08 -0700
> kys@exchange.microsoft.com wrote:
>
> > From: Michael Kelley <mhkelley@outlook.com>
> >
> > Fix bugs in signaling the Hyper-V host when freeing space in the
> > host->guest ring buffer:
> >
> > 1. The interrupt_mask must not be used to determine whether to signal
> > on the host->guest ring buffer
> > 2. The ring buffer write_index must be read (via hv_get_bytes_to_write)
> > *after* pending_send_sz is read in order to avoid a race condition
> > 3. Comparisons with pending_send_sz must treat the "equals" case as
> > not-enough-space
> > 4. Don't signal if the pending_send_sz feature is not present. Older
> > versions of Hyper-V that don't implement this feature will poll.
> >
> > Fixes: 03bad714a161 ("vmbus: more host signalling avoidance")
> >
> > Cc: Stable <stable@vger.kernel.org> # 4.14 and above
> > Signed-off-by: Michael Kelley <mhkelley@outlook.com>
> > Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
>
> What ever happened to this patch? It doesn't seem to be in char-misc, upstream,
> or stable kernel tree yet.
>
It was in the 4.14.31 and 4.15.14 stable releases.
thanks,
greg k-h
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prev parent reply other threads:[~2018-03-29 7:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-05 5:24 [PATCH 1/1] Drivers: hv: vmbus: Fix ring buffer signaling kys
2018-03-28 19:01 ` Stephen Hemminger
2018-03-28 19:18 ` Joshua R. Poulson
2018-03-28 23:25 ` Stephen Hemminger
2018-03-29 7:24 ` Greg KH [this message]
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