diff mbox series

[v4,07/10] net/ifc: add devarg for LM mode

Message ID 20181214211612.167681-8-xiao.w.wang@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Maxime Coquelin
Headers show
Series support SW assisted VDPA live migration | expand

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Wang, Xiao W Dec. 14, 2018, 9:16 p.m. UTC
This patch series enables a new method for live migration, i.e. software
assisted live migration. This patch provides a device argument for user
to choose the methold.

When "swlm=1", driver/device will do live migration with a relay thread
dealing with dirty page logging. Without this parameter, device will do
dirty page logging and there's no relay thread consuming CPU resource.

Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
---
 drivers/net/ifc/ifcvf_vdpa.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Comments

Maxime Coquelin Dec. 16, 2018, 9:21 a.m. UTC | #1
On 12/14/18 10:16 PM, Xiao Wang wrote:
> This patch series enables a new method for live migration, i.e. software
> assisted live migration. This patch provides a device argument for user
> to choose the methold.
> 
> When "swlm=1", driver/device will do live migration with a relay thread
> dealing with dirty page logging. Without this parameter, device will do
> dirty page logging and there's no relay thread consuming CPU resource.
> 
> Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
> ---
>   drivers/net/ifc/ifcvf_vdpa.c | 13 +++++++++++++
>   1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/net/ifc/ifcvf_vdpa.c b/drivers/net/ifc/ifcvf_vdpa.c
> index c0e50354a..395c5112f 100644
> --- a/drivers/net/ifc/ifcvf_vdpa.c
> +++ b/drivers/net/ifc/ifcvf_vdpa.c
> @@ -8,6 +8,7 @@
>   #include <sys/ioctl.h>
>   #include <sys/epoll.h>
>   #include <linux/virtio_net.h>
> +#include <stdbool.h>
>   
>   #include <rte_malloc.h>
>   #include <rte_memory.h>
> @@ -31,9 +32,11 @@
>   #endif
>   
>   #define IFCVF_VDPA_MODE		"vdpa"
> +#define IFCVF_SW_FALLBACK_LM	"swlm"


The patch looks good, except that I don't like the "swlm" name.
Maybe we could have something less obscure, even if a little bt longer?

What about "sw-live-migration"?
Wang, Xiao W Dec. 17, 2018, 9 a.m. UTC | #2
Hi Maxime,

> -----Original Message-----
> From: Maxime Coquelin [mailto:maxime.coquelin@redhat.com]
> Sent: Sunday, December 16, 2018 1:21 AM
> To: Wang, Xiao W <xiao.w.wang@intel.com>; Bie, Tiwei <tiwei.bie@intel.com>
> Cc: alejandro.lucero@netronome.com; dev@dpdk.org; Wang, Zhihong
> <zhihong.wang@intel.com>; Ye, Xiaolong <xiaolong.ye@intel.com>
> Subject: Re: [PATCH v4 07/10] net/ifc: add devarg for LM mode
> 
> 
> 
> On 12/14/18 10:16 PM, Xiao Wang wrote:
> > This patch series enables a new method for live migration, i.e. software
> > assisted live migration. This patch provides a device argument for user
> > to choose the methold.
> >
> > When "swlm=1", driver/device will do live migration with a relay thread
> > dealing with dirty page logging. Without this parameter, device will do
> > dirty page logging and there's no relay thread consuming CPU resource.
> >
> > Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
> > ---
> >   drivers/net/ifc/ifcvf_vdpa.c | 13 +++++++++++++
> >   1 file changed, 13 insertions(+)
> >
> > diff --git a/drivers/net/ifc/ifcvf_vdpa.c b/drivers/net/ifc/ifcvf_vdpa.c
> > index c0e50354a..395c5112f 100644
> > --- a/drivers/net/ifc/ifcvf_vdpa.c
> > +++ b/drivers/net/ifc/ifcvf_vdpa.c
> > @@ -8,6 +8,7 @@
> >   #include <sys/ioctl.h>
> >   #include <sys/epoll.h>
> >   #include <linux/virtio_net.h>
> > +#include <stdbool.h>
> >
> >   #include <rte_malloc.h>
> >   #include <rte_memory.h>
> > @@ -31,9 +32,11 @@
> >   #endif
> >
> >   #define IFCVF_VDPA_MODE		"vdpa"
> > +#define IFCVF_SW_FALLBACK_LM	"swlm"
> 
> 
> The patch looks good, except that I don't like the "swlm" name.
> Maybe we could have something less obscure, even if a little bt longer?
> 
> What about "sw-live-migration"?

Agree with you, making it clear is more reader-friendly than a short name.

Thanks,
Xiao
diff mbox series

Patch

diff --git a/drivers/net/ifc/ifcvf_vdpa.c b/drivers/net/ifc/ifcvf_vdpa.c
index c0e50354a..395c5112f 100644
--- a/drivers/net/ifc/ifcvf_vdpa.c
+++ b/drivers/net/ifc/ifcvf_vdpa.c
@@ -8,6 +8,7 @@ 
 #include <sys/ioctl.h>
 #include <sys/epoll.h>
 #include <linux/virtio_net.h>
+#include <stdbool.h>
 
 #include <rte_malloc.h>
 #include <rte_memory.h>
@@ -31,9 +32,11 @@ 
 #endif
 
 #define IFCVF_VDPA_MODE		"vdpa"
+#define IFCVF_SW_FALLBACK_LM	"swlm"
 
 static const char * const ifcvf_valid_arguments[] = {
 	IFCVF_VDPA_MODE,
+	IFCVF_SW_FALLBACK_LM,
 	NULL
 };
 
@@ -56,6 +59,7 @@  struct ifcvf_internal {
 	rte_atomic32_t dev_attached;
 	rte_atomic32_t running;
 	rte_spinlock_t lock;
+	bool sw_lm;
 };
 
 struct internal_list {
@@ -767,6 +771,7 @@  ifcvf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 	struct ifcvf_internal *internal = NULL;
 	struct internal_list *list = NULL;
 	int vdpa_mode = 0;
+	int sw_fallback_lm = 0;
 	struct rte_kvargs *kvlist = NULL;
 	int ret = 0;
 
@@ -826,6 +831,14 @@  ifcvf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 	internal->dev_addr.type = PCI_ADDR;
 	list->internal = internal;
 
+	if (rte_kvargs_count(kvlist, IFCVF_SW_FALLBACK_LM)) {
+		ret = rte_kvargs_process(kvlist, IFCVF_SW_FALLBACK_LM,
+				&open_int, &sw_fallback_lm);
+		if (ret < 0)
+			goto error;
+	}
+	internal->sw_lm = sw_fallback_lm;
+
 	internal->did = rte_vdpa_register_device(&internal->dev_addr,
 				&ifcvf_ops);
 	if (internal->did < 0) {