Displaying 20 results from an estimated 55 matches for "fetch_descs".
2020 Feb 14
0
vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot
...ck=000000001ae027fd index=1 fd=39 vq=00000000175f11ec
[ 67.801035] [1917] vhost_net:vhost_net_set_backend:1573: sock=0000000082d8d291
[ 67.801037] [1915] vhost:vhost_discard_vq_desc:2424: DISCARD [vq=0000000088199421][vq->last_avail_idx=0][vq->avail_idx=0][n=0]
[ 68.648803] [1915] vhost:fetch_descs:2328: [vq=0000000088199421][vq->last_avail_idx=0][vq->avail_idx=256][vq->ndescs=1]
[ 68.648810] [1915] vhost:fetch_descs:2328: [vq=0000000088199421][vq->last_avail_idx=1][vq->avail_idx=256][vq->ndescs=1]
[ 68.648812] [1915] vhost:fetch_descs:2328: [vq=0000000088199421][vq->...
2019 Oct 12
2
[PATCH RFC v1 2/2] vhost: batching fetches
...t16_to_cpu(vq, desc->flags);
> + h->flags = vhost16_to_cpu(vq, desc->flags) & VHOST_DESC_FLAGS;
> h->id = id;
>
> return 0;
> @@ -2450,7 +2454,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
> return 0;
> }
>
> -static int fetch_descs(struct vhost_virtqueue *vq)
> +static int fetch_buf(struct vhost_virtqueue *vq)
> {
> struct vring_desc desc;
> unsigned int i, head, found = 0;
> @@ -2462,7 +2466,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
> /* Check it isn't doing very strange things...
2019 Oct 12
2
[PATCH RFC v1 2/2] vhost: batching fetches
...t16_to_cpu(vq, desc->flags);
> + h->flags = vhost16_to_cpu(vq, desc->flags) & VHOST_DESC_FLAGS;
> h->id = id;
>
> return 0;
> @@ -2450,7 +2454,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
> return 0;
> }
>
> -static int fetch_descs(struct vhost_virtqueue *vq)
> +static int fetch_buf(struct vhost_virtqueue *vq)
> {
> struct vring_desc desc;
> unsigned int i, head, found = 0;
> @@ -2462,7 +2466,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
> /* Check it isn't doing very strange things...
2020 Jun 16
0
[PATCH RFC v7 03/14] vhost: use batched get_vq_desc version
...2:37:50PM +0200, Eugenio Perez Martin wrote:
> > > > > > > +/* This function returns a value > 0 if a descriptor was found, or 0 if none were found.
> > > > > > > + * A negative code is returned on error. */
> > > > > > > +static int fetch_descs(struct vhost_virtqueue *vq)
> > > > > > > +{
> > > > > > > + int ret;
> > > > > > > +
> > > > > > > + if (unlikely(vq->first_desc >= vq->ndescs)) {
> > > > > > > +...
2020 Feb 07
16
vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot
On Fri, Feb 07, 2020 at 08:47:14AM +0100, Christian Borntraeger wrote:
> Also adding Cornelia.
>
>
> On 06.02.20 23:17, Michael S. Tsirkin wrote:
> > On Thu, Feb 06, 2020 at 04:12:21PM +0100, Christian Borntraeger wrote:
> >>
> >>
> >> On 06.02.20 15:22, eperezma at redhat.com wrote:
> >>> Hi Christian.
> >>>
> >>>
2020 Feb 07
16
vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot
On Fri, Feb 07, 2020 at 08:47:14AM +0100, Christian Borntraeger wrote:
> Also adding Cornelia.
>
>
> On 06.02.20 23:17, Michael S. Tsirkin wrote:
> > On Thu, Feb 06, 2020 at 04:12:21PM +0100, Christian Borntraeger wrote:
> >>
> >>
> >> On 06.02.20 15:22, eperezma at redhat.com wrote:
> >>> Hi Christian.
> >>>
> >>>
2020 Jun 03
2
[PATCH RFC 03/13] vhost: batching fetches
...>avail_idx = vq->last_avail_idx;
> + vq->ndescs = vq->first_desc = 0;
> break;
> case VHOST_GET_VRING_BASE:
> s.index = idx;
> @@ -2136,7 +2146,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
> return 0;
> }
>
> -static int fetch_descs(struct vhost_virtqueue *vq)
> +static int fetch_buf(struct vhost_virtqueue *vq)
> {
> unsigned int i, head, found = 0;
> struct vhost_desc *last;
> @@ -2149,7 +2159,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
> /* Check it isn't doing very strange thing...
2020 Jun 03
2
[PATCH RFC 03/13] vhost: batching fetches
...>avail_idx = vq->last_avail_idx;
> + vq->ndescs = vq->first_desc = 0;
> break;
> case VHOST_GET_VRING_BASE:
> s.index = idx;
> @@ -2136,7 +2146,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
> return 0;
> }
>
> -static int fetch_descs(struct vhost_virtqueue *vq)
> +static int fetch_buf(struct vhost_virtqueue *vq)
> {
> unsigned int i, head, found = 0;
> struct vhost_desc *last;
> @@ -2149,7 +2159,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
> /* Check it isn't doing very strange thing...
2020 Jun 10
2
[PATCH RFC v6 02/11] vhost: use batched get_vq_desc version
...; {
> BUG_ON(!vq->ndescs);
> @@ -2428,7 +2191,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
>
> /* This function returns a value > 0 if a descriptor was found, or 0 if none were found.
> * A negative code is returned on error. */
> -static int fetch_descs(struct vhost_virtqueue *vq)
> +static int fetch_buf(struct vhost_virtqueue *vq)
> {
> unsigned int i, head, found = 0;
> struct vhost_desc *last;
> @@ -2441,7 +2204,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
> /* Check it isn't doing very strange thing...
2020 Jun 10
2
[PATCH RFC v6 02/11] vhost: use batched get_vq_desc version
...; {
> BUG_ON(!vq->ndescs);
> @@ -2428,7 +2191,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
>
> /* This function returns a value > 0 if a descriptor was found, or 0 if none were found.
> * A negative code is returned on error. */
> -static int fetch_descs(struct vhost_virtqueue *vq)
> +static int fetch_buf(struct vhost_virtqueue *vq)
> {
> unsigned int i, head, found = 0;
> struct vhost_desc *last;
> @@ -2441,7 +2204,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
> /* Check it isn't doing very strange thing...
2020 Apr 07
0
[PATCH v7 19/19] vhost: batching fetches
...num;
/* Forget the cached index value. */
vq->avail_idx = vq->last_avail_idx;
+ vq->ndescs = vq->first_desc = 0;
break;
case VHOST_GET_VRING_BASE:
s.index = idx;
@@ -2136,7 +2146,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
return 0;
}
-static int fetch_descs(struct vhost_virtqueue *vq)
+static int fetch_buf(struct vhost_virtqueue *vq)
{
unsigned int i, head, found = 0;
struct vhost_desc *last;
@@ -2149,7 +2159,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
/* Check it isn't doing very strange things with descriptor numbers. */
la...
2020 Apr 07
0
[PATCH v8 19/19] vhost: batching fetches
...num;
/* Forget the cached index value. */
vq->avail_idx = vq->last_avail_idx;
+ vq->ndescs = vq->first_desc = 0;
break;
case VHOST_GET_VRING_BASE:
s.index = idx;
@@ -2136,7 +2146,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
return 0;
}
-static int fetch_descs(struct vhost_virtqueue *vq)
+static int fetch_buf(struct vhost_virtqueue *vq)
{
unsigned int i, head, found = 0;
struct vhost_desc *last;
@@ -2149,7 +2159,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
/* Check it isn't doing very strange things with descriptor numbers. */
la...
2020 Jun 02
0
[PATCH RFC 03/13] vhost: batching fetches
...num;
/* Forget the cached index value. */
vq->avail_idx = vq->last_avail_idx;
+ vq->ndescs = vq->first_desc = 0;
break;
case VHOST_GET_VRING_BASE:
s.index = idx;
@@ -2136,7 +2146,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
return 0;
}
-static int fetch_descs(struct vhost_virtqueue *vq)
+static int fetch_buf(struct vhost_virtqueue *vq)
{
unsigned int i, head, found = 0;
struct vhost_desc *last;
@@ -2149,7 +2159,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
/* Check it isn't doing very strange things with descriptor numbers. */
la...
2019 Oct 11
0
[PATCH RFC v1 2/2] vhost: batching fetches
...st32_to_cpu(vq, desc->len);
- h->flags = vhost16_to_cpu(vq, desc->flags);
+ h->flags = vhost16_to_cpu(vq, desc->flags) & VHOST_DESC_FLAGS;
h->id = id;
return 0;
@@ -2450,7 +2454,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
return 0;
}
-static int fetch_descs(struct vhost_virtqueue *vq)
+static int fetch_buf(struct vhost_virtqueue *vq)
{
struct vring_desc desc;
unsigned int i, head, found = 0;
@@ -2462,7 +2466,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
/* Check it isn't doing very strange things with descriptor numbers. */
las...
2020 Jun 04
0
[PATCH RFC 03/13] vhost: batching fetches
...l_idx;
> > + vq->ndescs = vq->first_desc = 0;
> > break;
> > case VHOST_GET_VRING_BASE:
> > s.index = idx;
> > @@ -2136,7 +2146,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
> > return 0;
> > }
> > -static int fetch_descs(struct vhost_virtqueue *vq)
> > +static int fetch_buf(struct vhost_virtqueue *vq)
> > {
> > unsigned int i, head, found = 0;
> > struct vhost_desc *last;
> > @@ -2149,7 +2159,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
> > /* Check it isn&...
2020 Jun 02
0
[PATCH RFC 04/13] vhost: cleanup fetch_buf return code handling
...static int fetch_buf(struct vhost_virtqueue *vq)
/* On success, increment avail index. */
vq->last_avail_idx++;
- return 0;
+ return 1;
}
+/* This function returns a value > 0 if a descriptor was found, or 0 if none were found.
+ * A negative code is returned on error. */
static int fetch_descs(struct vhost_virtqueue *vq)
{
- int ret = 0;
+ int ret;
if (unlikely(vq->first_desc >= vq->ndescs)) {
vq->first_desc = 0;
@@ -2266,10 +2270,14 @@ static int fetch_descs(struct vhost_virtqueue *vq)
if (vq->ndescs)
return 0;
- while (!ret && vq->ndescs <= v...
2019 Oct 12
0
[PATCH RFC v1 2/2] vhost: batching fetches
...->flags);
> > + h->flags = vhost16_to_cpu(vq, desc->flags) & VHOST_DESC_FLAGS;
> > h->id = id;
> > return 0;
> > @@ -2450,7 +2454,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
> > return 0;
> > }
> > -static int fetch_descs(struct vhost_virtqueue *vq)
> > +static int fetch_buf(struct vhost_virtqueue *vq)
> > {
> > struct vring_desc desc;
> > unsigned int i, head, found = 0;
> > @@ -2462,7 +2466,11 @@ static int fetch_descs(struct vhost_virtqueue *vq)
> > /* Check it isn...
2020 Jun 11
2
[PATCH RFC v6 02/11] vhost: use batched get_vq_desc version
...2020/6/10 ??7:05, Michael S. Tsirkin wrote:
>>> +EXPORT_SYMBOL_GPL(vhost_get_vq_desc);
>>> /* Reverse the effect of vhost_get_vq_desc. Useful for error handling. */
>>> void vhost_discard_vq_desc(struct vhost_virtqueue *vq, int n)
>>> {
>>> + unfetch_descs(vq);
>>> vq->last_avail_idx -= n;
>> So unfetch_descs() has decreased last_avail_idx.
>> Can we fix this by letting unfetch_descs() return the number and then we can
>> do:
>>
>> int d = unfetch_descs(vq);
>> vq->last_avail_idx -= (n > d) ?...
2020 Jun 11
2
[PATCH RFC v6 02/11] vhost: use batched get_vq_desc version
...2020/6/10 ??7:05, Michael S. Tsirkin wrote:
>>> +EXPORT_SYMBOL_GPL(vhost_get_vq_desc);
>>> /* Reverse the effect of vhost_get_vq_desc. Useful for error handling. */
>>> void vhost_discard_vq_desc(struct vhost_virtqueue *vq, int n)
>>> {
>>> + unfetch_descs(vq);
>>> vq->last_avail_idx -= n;
>> So unfetch_descs() has decreased last_avail_idx.
>> Can we fix this by letting unfetch_descs() return the number and then we can
>> do:
>>
>> int d = unfetch_descs(vq);
>> vq->last_avail_idx -= (n > d) ?...
2020 Jun 11
0
[PATCH RFC v8 02/11] vhost: use batched get_vq_desc version
...lit_desc(struct vhost_virtqueue *vq)
{
BUG_ON(!vq->ndescs);
@@ -2428,7 +2191,7 @@ static int fetch_indirect_descs(struct vhost_virtqueue *vq,
/* This function returns a value > 0 if a descriptor was found, or 0 if none were found.
* A negative code is returned on error. */
-static int fetch_descs(struct vhost_virtqueue *vq)
+static int fetch_buf(struct vhost_virtqueue *vq)
{
unsigned int i, head, found = 0;
struct vhost_desc *last;
@@ -2441,7 +2204,7 @@ static int fetch_descs(struct vhost_virtqueue *vq)
/* Check it isn't doing very strange things with descriptor numbers. */
las...