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From: Thomas Monjalon <thomas@monjalon.net>
To: Eelco Chaudron <echaudro@redhat.com>,
	chenbo.xia@intel.com, david.marchand@redhat.com,
	Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: dev@dpdk.org
Subject: Re: [PATCH v3 4/4] vhost: add device op to offload the interrupt kick
Date: Tue, 30 May 2023 15:16:17 +0200	[thread overview]
Message-ID: <16690234.Ash8RoxBsO@thomas> (raw)
In-Reply-To: <49ec9930-66b8-fc95-72ad-5cb012ed8635@redhat.com>

30/05/2023 15:02, Maxime Coquelin:
> 
> On 5/17/23 11:09, Eelco Chaudron wrote:
> > This patch adds an operation callback which gets called every time the
> > library wants to call eventfd_write(). This eventfd_write() call could
> > result in a system call, which could potentially block the PMD thread.
> > 
> > The callback function can decide whether it's ok to handle the
> > eventfd_write() now or have the newly introduced function,
> > rte_vhost_notify_guest(), called at a later time.
> > 
> > This can be used by 3rd party applications, like OVS, to avoid system
> > calls being called as part of the PMD threads.
> > 
> > Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
> > ---
> >   lib/vhost/meson.build |    2 ++
> >   lib/vhost/rte_vhost.h |   23 +++++++++++++++++-
> >   lib/vhost/socket.c    |   63 ++++++++++++++++++++++++++++++++++++++++++++++---
> >   lib/vhost/version.map |    9 +++++++
> >   lib/vhost/vhost.c     |   38 ++++++++++++++++++++++++++++++
> >   lib/vhost/vhost.h     |   58 ++++++++++++++++++++++++++++++++-------------
> >   6 files changed, 171 insertions(+), 22 deletions(-)
> > 
> 
> 
> The patch looks good to me, but that's the first time we use function
> versioning in Vhost library, so I'd like another pair of eyes to be sure
> I don't miss anything.
> 
> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> 
> Thomas, do we need to mention it somewhere in the release note?

If compatibility is kept, I think we don't need to mention it.



  reply	other threads:[~2023-05-30 13:16 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-17  9:08 [PATCH v3 0/4] " Eelco Chaudron
2023-05-17  9:08 ` [PATCH v3 1/4] vhost: change vhost_virtqueue access lock to a read/write one Eelco Chaudron
2023-05-17 17:33   ` Maxime Coquelin
2023-05-18 14:46     ` Eelco Chaudron
2023-05-31  6:37   ` Xia, Chenbo
2023-05-31  9:27     ` Maxime Coquelin
2023-05-31 11:13       ` Eelco Chaudron
2023-06-01  1:45         ` Xia, Chenbo
2023-05-17  9:08 ` [PATCH v3 2/4] vhost: make the guest_notifications statistic counter atomic Eelco Chaudron
2023-05-30 12:52   ` Maxime Coquelin
2023-05-31  7:03   ` Xia, Chenbo
2023-05-17  9:09 ` [PATCH v3 3/4] vhost: fix invalid call FD handling Eelco Chaudron
2023-05-30 12:54   ` Maxime Coquelin
2023-05-31  6:12     ` Xia, Chenbo
2023-05-31  9:30       ` Maxime Coquelin
2023-05-17  9:09 ` [PATCH v3 4/4] vhost: add device op to offload the interrupt kick Eelco Chaudron
2023-05-30 13:02   ` Maxime Coquelin
2023-05-30 13:16     ` Thomas Monjalon [this message]
2023-05-30 15:16       ` Maxime Coquelin
2023-05-31  6:19         ` Xia, Chenbo
2023-05-31  9:29           ` Maxime Coquelin
2023-05-31 11:21             ` Eelco Chaudron
2023-06-01  2:18             ` Xia, Chenbo
2023-06-01  8:15               ` Eelco Chaudron
2023-06-01  8:29                 ` Maxime Coquelin
2023-06-01  8:49                   ` Eelco Chaudron
2023-06-01  8:53                     ` Maxime Coquelin
2023-05-31 11:49     ` David Marchand
2023-05-31 12:01   ` David Marchand
2023-05-31 12:48     ` Maxime Coquelin
2023-05-31 13:13       ` Eelco Chaudron
2023-05-31 14:12   ` David Marchand
2023-05-31 14:18     ` Maxime Coquelin
2023-06-01 20:00 ` [PATCH v3 0/4] " Maxime Coquelin
2023-06-02  6:20   ` Eelco Chaudron

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