From: Bruce Richardson <bruce.richardson@intel.com>
To: Ilya Maximets <i.maximets@samsung.com>
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>,
dev@dpdk.org, tiwei.bie@intel.com, zhihong.wang@intel.com,
jfreimann@redhat.com, dgilbert@redhat.com,
Thomas Monjalon <thomas@monjalon.net>
Subject: Re: [dpdk-dev] [04/12] vhost: introduce postcopy's advise message
Date: Fri, 28 Sep 2018 13:13:35 +0100 [thread overview]
Message-ID: <20180928121334.GA6880@bricha3-MOBL.ger.corp.intel.com> (raw)
In-Reply-To: <20180928103815eucas1p1ddb4141bea8b9ef965073a4706ccdaea~YihUJIT9-2460124601eucas1p1Z@eucas1p1.samsung.com>
On Fri, Sep 28, 2018 at 01:40:25PM +0300, Ilya Maximets wrote:
> On 27.09.2018 11:28, Ilya Maximets wrote:
> > On 26.09.2018 10:26, Maxime Coquelin wrote:
> >> This patch opens a userfaultfd and sends it back to Qemu's
> >> VHOST_USER_POSTCOPY_ADVISE request.
> >>
> >> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> >> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> >> ---
> >> lib/librte_vhost/vhost.h | 2 ++
> >> lib/librte_vhost/vhost_user.c | 37 +++++++++++++++++++++++++++++++++++
> >> lib/librte_vhost/vhost_user.h | 3 ++-
> >> 3 files changed, 41 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
> >> index 25ffd7614..21722d8a8 100644
> >> --- a/lib/librte_vhost/vhost.h
> >> +++ b/lib/librte_vhost/vhost.h
> >> @@ -363,6 +363,8 @@ struct virtio_net {
> >> int slave_req_fd;
> >> rte_spinlock_t slave_req_lock;
> >>
> >> + int postcopy_ufd;
> >> +
> >> /*
> >> * Device id to identify a specific backend device.
> >> * It's set to -1 for the default software implementation.
> >> diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
> >> index a9b429598..bdfe2cac0 100644
> >> --- a/lib/librte_vhost/vhost_user.c
> >> +++ b/lib/librte_vhost/vhost_user.c
> >> @@ -24,9 +24,13 @@
> >> #include <stdlib.h>
> >> #include <string.h>
> >> #include <unistd.h>
> >> +#include <fcntl.h>
> >> +#include <linux/userfaultfd.h>
> >
> > Maybe we need compile time check for this header existence?
> > Otherwise, this will bump minimal kernel version for default linux build
> > to something like 4.3.
>
> We'll need a config option here (disabled by default) and guard all
> the postcopy related code.
> Meson build will be able to detect the header file and enable
> the config if possible. Like this:
>
> lib/librte_vhost/meson.build:
> if cc.has_header('linux/userfaultfd.h')
> dpdk_conf.set10('RTE_LIBRTE_VHOST_POSTCOPY', true)
Are you sure you want 'set10' rather than 'set'. Set is probably easier
because it ensures no define on false, while set10 has a define of 0. This
has caught me out before.
FYI, you can also avoid the if by putting the condition into the define:
dpdk_conf.set('RTE_LIBRTE_VHOST_POSTCOPY', cc.has_header('...'))
/Bruce
next prev parent reply other threads:[~2018-09-28 12:13 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-26 7:26 [dpdk-dev] [PATCH 00/12] vhost: add postcopy live-migration support Maxime Coquelin
2018-09-26 7:26 ` [dpdk-dev] [PATCH 01/12] vhost: define postcopy protocol flag Maxime Coquelin
2018-09-26 7:26 ` [dpdk-dev] [PATCH 02/12] vhost: add number of fds to vhost-user messages and use it Maxime Coquelin
2018-09-26 7:26 ` [dpdk-dev] [PATCH 03/12] vhost: enable fds passing when sending vhost-user messages Maxime Coquelin
2018-09-26 7:26 ` [dpdk-dev] [PATCH 04/12] vhost: introduce postcopy's advise message Maxime Coquelin
2018-09-26 15:22 ` Alejandro Lucero
2018-09-27 9:35 ` Maxime Coquelin
[not found] ` <CGME20180927082608eucas1p17cd1d99e54134fb2a6de3151e52048f3@eucas1p1.samsung.com>
2018-09-27 8:28 ` [dpdk-dev] [04/12] " Ilya Maximets
2018-09-28 10:40 ` Ilya Maximets
2018-09-28 12:13 ` Bruce Richardson [this message]
2018-09-28 13:17 ` Ilya Maximets
2018-09-28 13:24 ` Bruce Richardson
2018-09-28 13:49 ` Maxime Coquelin
2018-09-26 7:26 ` [dpdk-dev] [PATCH 05/12] vhost: add support for postcopy's listen message Maxime Coquelin
2018-09-26 7:26 ` [dpdk-dev] [PATCH 06/12] vhost: register new regions with userfaultfd Maxime Coquelin
2018-09-26 15:31 ` Alejandro Lucero
2018-09-27 9:37 ` Maxime Coquelin
2018-09-26 7:27 ` [dpdk-dev] [PATCH 07/12] vhost: avoid useless VhostUserMemory copy Maxime Coquelin
2018-09-26 7:27 ` [dpdk-dev] [PATCH 08/12] vhost: send userfault range addresses back to qemu Maxime Coquelin
2018-09-26 7:27 ` [dpdk-dev] [PATCH 09/12] vhost: add support to postcopy's end request Maxime Coquelin
2018-09-26 7:27 ` [dpdk-dev] [PATCH 10/12] vhost: enable postcopy protocol feature Maxime Coquelin
2018-09-26 7:27 ` [dpdk-dev] [PATCH 11/12] vhost: add flag to enable postcopy live-migration Maxime Coquelin
2018-09-26 7:27 ` [dpdk-dev] [PATCH 12/12] net/vhost: add parameter to enable postcopy migration support Maxime Coquelin
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