Displaying 20 results from an estimated 35 matches for "vhost_arch_can_accel_uaccess".
2019 Jun 06
2
[PATCH] vhost: Don't use defined in VHOST_ARCH_CAN_ACCEL_UACCESS definition
Clang warns:
drivers/vhost/vhost.c:2085:5: warning: macro expansion producing
'defined' has undefined behavior [-Wexpansion-to-defined]
#if VHOST_ARCH_CAN_ACCEL_UACCESS
^
drivers/vhost/vhost.h:98:38: note: expanded from macro
'VHOST_ARCH_CAN_ACCEL_UACCESS'
#define VHOST_ARCH_CAN_ACCEL_UACCESS defined(CONFIG_MMU_NOTIFIER) && \
^
Rework VHOST_ARCH_CAN_ACCEL_UACCESS to be defined under those conditio...
2019 Jun 06
2
[PATCH] vhost: Don't use defined in VHOST_ARCH_CAN_ACCEL_UACCESS definition
Clang warns:
drivers/vhost/vhost.c:2085:5: warning: macro expansion producing
'defined' has undefined behavior [-Wexpansion-to-defined]
#if VHOST_ARCH_CAN_ACCEL_UACCESS
^
drivers/vhost/vhost.h:98:38: note: expanded from macro
'VHOST_ARCH_CAN_ACCEL_UACCESS'
#define VHOST_ARCH_CAN_ACCEL_UACCESS defined(CONFIG_MMU_NOTIFIER) && \
^
Rework VHOST_ARCH_CAN_ACCEL_UACCESS to be defined under those conditio...
2019 Jun 06
0
[PATCH] vhost: Don't use defined in VHOST_ARCH_CAN_ACCEL_UACCESS definition
On Thu, Jun 06, 2019 at 09:12:23AM -0700, Nathan Chancellor wrote:
> Clang warns:
>
> drivers/vhost/vhost.c:2085:5: warning: macro expansion producing
> 'defined' has undefined behavior [-Wexpansion-to-defined]
> #if VHOST_ARCH_CAN_ACCEL_UACCESS
> ^
> drivers/vhost/vhost.h:98:38: note: expanded from macro
> 'VHOST_ARCH_CAN_ACCEL_UACCESS'
> #define VHOST_ARCH_CAN_ACCEL_UACCESS defined(CONFIG_MMU_NOTIFIER) && \
> ^
>
> Rework VHOST_ARCH_CAN_ACCEL_UACCESS...
2019 Sep 06
1
[PATCH 1/2] Revert "vhost: access vq metadata through kernel virtual address"
.../vhost/vhost.c b/drivers/vhost/vhost.c
> index 0536f8526359..791562e03fe0 100644
> --- a/drivers/vhost/vhost.c
> +++ b/drivers/vhost/vhost.c
> @@ -298,160 +298,6 @@ static void vhost_vq_meta_reset(struct vhost_dev *d)
> __vhost_vq_meta_reset(d->vqs[i]);
> }
>
> -#if VHOST_ARCH_CAN_ACCEL_UACCESS
> -static void vhost_map_unprefetch(struct vhost_map *map)
> -{
> - kfree(map->pages);
> - map->pages = NULL;
> - map->npages = 0;
> - map->addr = NULL;
> -}
> -
> -static void vhost_uninit_vq_maps(struct vhost_virtqueue *vq)
> -{
> - struct vhost_map *m...
2019 Sep 05
8
[PATCH 0/2] Revert and rework on the metadata accelreation
Hi:
Per request from Michael and Jason, the metadata accelreation is
reverted in this version and rework in next version.
Please review.
Thanks
Jason Wang (2):
Revert "vhost: access vq metadata through kernel virtual address"
vhost: re-introducing metadata acceleration through kernel virtual
address
drivers/vhost/vhost.c | 202 +++++++++++++++++++++++++-----------------
2019 Sep 05
8
[PATCH 0/2] Revert and rework on the metadata accelreation
Hi:
Per request from Michael and Jason, the metadata accelreation is
reverted in this version and rework in next version.
Please review.
Thanks
Jason Wang (2):
Revert "vhost: access vq metadata through kernel virtual address"
vhost: re-introducing metadata acceleration through kernel virtual
address
drivers/vhost/vhost.c | 202 +++++++++++++++++++++++++-----------------
2019 Sep 05
0
[PATCH 1/2] Revert "vhost: access vq metadata through kernel virtual address"
..., 553 deletions(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 0536f8526359..791562e03fe0 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -298,160 +298,6 @@ static void vhost_vq_meta_reset(struct vhost_dev *d)
__vhost_vq_meta_reset(d->vqs[i]);
}
-#if VHOST_ARCH_CAN_ACCEL_UACCESS
-static void vhost_map_unprefetch(struct vhost_map *map)
-{
- kfree(map->pages);
- map->pages = NULL;
- map->npages = 0;
- map->addr = NULL;
-}
-
-static void vhost_uninit_vq_maps(struct vhost_virtqueue *vq)
-{
- struct vhost_map *map[VHOST_NUM_ADDRS];
- int i;
-
- spin_lock(&vq->...
2019 Sep 05
0
[PATCH 2/2] vhost: re-introducing metadata acceleration through kernel virtual address
...+), 3 deletions(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 791562e03fe0..f98155f28f02 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -298,6 +298,182 @@ static void vhost_vq_meta_reset(struct vhost_dev *d)
__vhost_vq_meta_reset(d->vqs[i]);
}
+#if VHOST_ARCH_CAN_ACCEL_UACCESS
+static void vhost_map_unprefetch(struct vhost_map *map)
+{
+ kfree(map->pages);
+ kfree(map);
+}
+
+static void vhost_set_map_dirty(struct vhost_virtqueue *vq,
+ struct vhost_map *map, int index)
+{
+ struct vhost_uaddr *uaddr = &vq->uaddrs[index];
+ int i;
+
+ if (uaddr->write) {...
2019 Jul 26
2
[PATCH] vhost: disable metadata prefetch optimization
...on(-)
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 819296332913..42a8c2a13ab1 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -96,7 +96,7 @@ struct vhost_uaddr {
};
#if defined(CONFIG_MMU_NOTIFIER) && ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE == 0
-#define VHOST_ARCH_CAN_ACCEL_UACCESS 1
+#define VHOST_ARCH_CAN_ACCEL_UACCESS 0
#else
#define VHOST_ARCH_CAN_ACCEL_UACCESS 0
#endif
--
MST
2019 Jul 26
2
[PATCH] vhost: disable metadata prefetch optimization
...on(-)
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 819296332913..42a8c2a13ab1 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -96,7 +96,7 @@ struct vhost_uaddr {
};
#if defined(CONFIG_MMU_NOTIFIER) && ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE == 0
-#define VHOST_ARCH_CAN_ACCEL_UACCESS 1
+#define VHOST_ARCH_CAN_ACCEL_UACCESS 0
#else
#define VHOST_ARCH_CAN_ACCEL_UACCESS 0
#endif
--
MST
2019 Sep 08
3
[PATCH 2/2] vhost: re-introducing metadata acceleration through kernel virtual address
.../vhost/vhost.c b/drivers/vhost/vhost.c
> index 791562e03fe0..f98155f28f02 100644
> --- a/drivers/vhost/vhost.c
> +++ b/drivers/vhost/vhost.c
> @@ -298,6 +298,182 @@ static void vhost_vq_meta_reset(struct vhost_dev *d)
> __vhost_vq_meta_reset(d->vqs[i]);
> }
>
> +#if VHOST_ARCH_CAN_ACCEL_UACCESS
> +static void vhost_map_unprefetch(struct vhost_map *map)
> +{
> + kfree(map->pages);
> + kfree(map);
> +}
> +
> +static void vhost_set_map_dirty(struct vhost_virtqueue *vq,
> + struct vhost_map *map, int index)
> +{
> + struct vhost_uaddr *uaddr = &vq->u...
2019 Sep 08
3
[PATCH 2/2] vhost: re-introducing metadata acceleration through kernel virtual address
.../vhost/vhost.c b/drivers/vhost/vhost.c
> index 791562e03fe0..f98155f28f02 100644
> --- a/drivers/vhost/vhost.c
> +++ b/drivers/vhost/vhost.c
> @@ -298,6 +298,182 @@ static void vhost_vq_meta_reset(struct vhost_dev *d)
> __vhost_vq_meta_reset(d->vqs[i]);
> }
>
> +#if VHOST_ARCH_CAN_ACCEL_UACCESS
> +static void vhost_map_unprefetch(struct vhost_map *map)
> +{
> + kfree(map->pages);
> + kfree(map);
> +}
> +
> +static void vhost_set_map_dirty(struct vhost_virtqueue *vq,
> + struct vhost_map *map, int index)
> +{
> + struct vhost_uaddr *uaddr = &vq->u...
2019 Sep 09
0
[PATCH 2/2] vhost: re-introducing metadata acceleration through kernel virtual address
...t.c
>> index 791562e03fe0..f98155f28f02 100644
>> --- a/drivers/vhost/vhost.c
>> +++ b/drivers/vhost/vhost.c
>> @@ -298,6 +298,182 @@ static void vhost_vq_meta_reset(struct vhost_dev *d)
>> __vhost_vq_meta_reset(d->vqs[i]);
>> }
>>
>> +#if VHOST_ARCH_CAN_ACCEL_UACCESS
>> +static void vhost_map_unprefetch(struct vhost_map *map)
>> +{
>> + kfree(map->pages);
>> + kfree(map);
>> +}
>> +
>> +static void vhost_set_map_dirty(struct vhost_virtqueue *vq,
>> + struct vhost_map *map, int index)
>> +{
>> + s...
2019 Sep 09
1
[PATCH 2/2] vhost: re-introducing metadata acceleration through kernel virtual address
...2e03fe0..f98155f28f02 100644
> > > --- a/drivers/vhost/vhost.c
> > > +++ b/drivers/vhost/vhost.c
> > > @@ -298,6 +298,182 @@ static void vhost_vq_meta_reset(struct vhost_dev *d)
> > > __vhost_vq_meta_reset(d->vqs[i]);
> > > }
> > > +#if VHOST_ARCH_CAN_ACCEL_UACCESS
> > > +static void vhost_map_unprefetch(struct vhost_map *map)
> > > +{
> > > + kfree(map->pages);
> > > + kfree(map);
> > > +}
> > > +
> > > +static void vhost_set_map_dirty(struct vhost_virtqueue *vq,
> > > + struct vho...
2019 May 24
10
[PATCH net-next 0/6] vhost: accelerate metadata access
Hi:
This series tries to access virtqueue metadata through kernel virtual
address instead of copy_user() friends since they had too much
overheads like checks, spec barriers or even hardware feature
toggling like SMAP. This is done through setup kernel address through
direct mapping and co-opreate VM management with MMU notifiers.
Test shows about 23% improvement on TX PPS. TCP_STREAM
2019 May 24
10
[PATCH net-next 0/6] vhost: accelerate metadata access
Hi:
This series tries to access virtqueue metadata through kernel virtual
address instead of copy_user() friends since they had too much
overheads like checks, spec barriers or even hardware feature
toggling like SMAP. This is done through setup kernel address through
direct mapping and co-opreate VM management with MMU notifiers.
Test shows about 23% improvement on TX PPS. TCP_STREAM
2019 Aug 07
11
[PATCH V3 00/10] Fixes for metadata accelreation
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost worker
- set dirty pages after no readers
- return -EAGAIN only when we find the range is overlapped with
metadata
Jason Wang (9):
2019 Jul 26
0
[PATCH] vhost: disable metadata prefetch optimization
.../drivers/vhost/vhost.h
> index 819296332913..42a8c2a13ab1 100644
> --- a/drivers/vhost/vhost.h
> +++ b/drivers/vhost/vhost.h
> @@ -96,7 +96,7 @@ struct vhost_uaddr {
> };
>
> #if defined(CONFIG_MMU_NOTIFIER) && ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE == 0
> -#define VHOST_ARCH_CAN_ACCEL_UACCESS 1
> +#define VHOST_ARCH_CAN_ACCEL_UACCESS 0
> #else
> #define VHOST_ARCH_CAN_ACCEL_UACCESS 0
> #endif
2019 Aug 07
0
[PATCH V3 01/10] vhost: disable metadata prefetch optimization
...on(-)
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 819296332913..42a8c2a13ab1 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -96,7 +96,7 @@ struct vhost_uaddr {
};
#if defined(CONFIG_MMU_NOTIFIER) && ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE == 0
-#define VHOST_ARCH_CAN_ACCEL_UACCESS 1
+#define VHOST_ARCH_CAN_ACCEL_UACCESS 0
#else
#define VHOST_ARCH_CAN_ACCEL_UACCESS 0
#endif
--
2.18.1
2019 Jul 17
17
[PATCH V3 00/15] Packed virtqueue support for vhost
Hi all:
This series implements packed virtqueues which were described
at [1]. In this version we try to address the performance regression
saw by V2. The root cause is packed virtqueue need more times of
userspace memory accesssing which turns out to be very
expensive. Thanks to the help of 7f466032dc9e ("vhost: access vq
metadata through kernel virtual address"), such overhead cold be