lkml.org 
[lkml]   [2018]   [Mar]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/1] Drivers: hv: vmbus: Fix ring buffer signaling
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.


\
 
 \ /
  Last update: 2018-03-28 21:02    [W:0.058 / U:2.356 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site