search for: sg_next_chained

...tio_ring.c b/drivers/virtio/virtio_ring.c index 4d08f45a9c29..d356a701c9c2 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -99,25 +99,9 @@ struct vring_virtqueue #define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq) -static inline struct scatterlist *sg_next_chained(struct scatterlist *sg, - unsigned int *count) -{ - return sg_next(sg); -} - -static inline struct scatterlist *sg_next_arr(struct scatterlist *sg, - unsigned int *count) -{ - if (--(*count) == 0) - return NULL; - return sg + 1; -} - /* Set up an indirect table of descriptors and...

...io_ring.c b/drivers/virtio/virtio_ring.c index 4d08f45a9c29..374399c62080 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -99,28 +99,10 @@ struct vring_virtqueue #define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq) -static inline struct scatterlist *sg_next_chained(struct scatterlist *sg, - unsigned int *count) -{ - return sg_next(sg); -} - -static inline struct scatterlist *sg_next_arr(struct scatterlist *sg, - unsigned int *count) -{ - if (--(*count) == 0) - return NULL; - return sg + 1; -} - /* Set up an indirect table of descriptors and...

...* @sgs: array of terminated scatterlists. > * @out_num: the number of scatterlists readable by other side > @@ -337,7 +351,7 @@ int virtqueue_add_sgs(struct virtqueue *_vq, > for (sg = sgs[i]; sg; sg = sg_next(sg)) > total_in++; > } > - return virtqueue_add(_vq, sgs, sg_next_chained, > + return virtqueue_add(_vq, false, sgs, sg_next_chained, > total_out, total_in, out_sgs, in_sgs, data, gfp); > } > EXPORT_SYMBOL_GPL(virtqueue_add_sgs); > @@ -360,11 +374,35 @@ int virtqueue_add_outbuf(struct virtqueue *vq, > void *data, > gfp_t gfp) &gt...

...queue we're talking about. * @sgs: array of terminated scatterlists. * @out_num: the number of scatterlists readable by other side @@ -337,7 +351,7 @@ int virtqueue_add_sgs(struct virtqueue *_vq, for (sg = sgs[i]; sg; sg = sg_next(sg)) total_in++; } - return virtqueue_add(_vq, sgs, sg_next_chained, + return virtqueue_add(_vq, false, sgs, sg_next_chained, total_out, total_in, out_sgs, in_sgs, data, gfp); } EXPORT_SYMBOL_GPL(virtqueue_add_sgs); @@ -360,11 +374,35 @@ int virtqueue_add_outbuf(struct virtqueue *vq, void *data, gfp_t gfp) { - return virtqueue_add(vq, &sg,...

...queue we're talking about. * @sgs: array of terminated scatterlists. * @out_num: the number of scatterlists readable by other side @@ -337,7 +351,7 @@ int virtqueue_add_sgs(struct virtqueue *_vq, for (sg = sgs[i]; sg; sg = sg_next(sg)) total_in++; } - return virtqueue_add(_vq, sgs, sg_next_chained, + return virtqueue_add(_vq, false, sgs, sg_next_chained, total_out, total_in, out_sgs, in_sgs, data, gfp); } EXPORT_SYMBOL_GPL(virtqueue_add_sgs); @@ -360,11 +374,35 @@ int virtqueue_add_outbuf(struct virtqueue *vq, void *data, gfp_t gfp) { - return virtqueue_add(vq, &sg,...

..._ring.c b/drivers/virtio/virtio_ring.c index 8e531578065f..a6cdb52ae9b2 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -107,28 +107,10 @@ struct vring_virtqueue #define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq) -static inline struct scatterlist *sg_next_chained(struct scatterlist *sg, - unsigned int *count) -{ - return sg_next(sg); -} - -static inline struct scatterlist *sg_next_arr(struct scatterlist *sg, - unsigned int *count) -{ - if (--(*count) == 0) - return NULL; - return sg + 1; -} - /* Set up an indirect table of descriptors and...

..._ring.c b/drivers/virtio/virtio_ring.c index 8e531578065f..a6cdb52ae9b2 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -107,28 +107,10 @@ struct vring_virtqueue #define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq) -static inline struct scatterlist *sg_next_chained(struct scatterlist *sg, - unsigned int *count) -{ - return sg_next(sg); -} - -static inline struct scatterlist *sg_next_arr(struct scatterlist *sg, - unsigned int *count) -{ - if (--(*count) == 0) - return NULL; - return sg + 1; -} - /* Set up an indirect table of descriptors and...

This fixes virtio on Xen guests as well as on any other platform on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches, everything works. There

This fixes virtio on Xen guests as well as on any other platform on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches, everything works. There

I resurrected these patches after prompting from Andy Lutomirski's recent patches. I put them on the back-burner because vring_bench had a 15% slowdown on my laptop: pktgen testing revealed a speedup, if anything, so I've cleaned them up. Rusty Russell (3): virtio_net: pass well-formed sgs to virtqueue_add_*() virtio_ring: assume sgs are always well-formed. virtio_ring: unify

I resurrected these patches after prompting from Andy Lutomirski's recent patches. I put them on the back-burner because vring_bench had a 15% slowdown on my laptop: pktgen testing revealed a speedup, if anything, so I've cleaned them up. Rusty Russell (3): virtio_net: pass well-formed sgs to virtqueue_add_*() virtio_ring: assume sgs are always well-formed. virtio_ring: unify

OK, so I've spent a few days benchmarking. Turns out 80% of virtio_add_buf cases are uni-directional (including the always-performance-sensitive networking code), and that gets no performance penalty (though tests with real networking would be appreciated!). I'm not reposting all the "convert driver to virtio_add_outbuf()" patches: just the scsi one which I didn't have

OK, so I've spent a few days benchmarking. Turns out 80% of virtio_add_buf cases are uni-directional (including the always-performance-sensitive networking code), and that gets no performance penalty (though tests with real networking would be appreciated!). I'm not reposting all the "convert driver to virtio_add_outbuf()" patches: just the scsi one which I didn't have

...queue we're talking about. * @sgs: array of terminated scatterlists. * @out_num: the number of scatterlists readable by other side @@ -337,7 +351,7 @@ int virtqueue_add_sgs(struct virtqueue *_vq, for (sg = sgs[i]; sg; sg = sg_next(sg)) total_in++; } - return virtqueue_add(_vq, sgs, sg_next_chained, + return virtqueue_add(_vq, false, sgs, sg_next_chained, total_out, total_in, out_sgs, in_sgs, data, gfp); } EXPORT_SYMBOL_GPL(virtqueue_add_sgs); @@ -360,11 +374,35 @@ int virtqueue_add_outbuf(struct virtqueue *vq, void *data, gfp_t gfp) { - return virtqueue_add(vq, &sg,...

...queue we're talking about. * @sgs: array of terminated scatterlists. * @out_num: the number of scatterlists readable by other side @@ -337,7 +351,7 @@ int virtqueue_add_sgs(struct virtqueue *_vq, for (sg = sgs[i]; sg; sg = sg_next(sg)) total_in++; } - return virtqueue_add(_vq, sgs, sg_next_chained, + return virtqueue_add(_vq, false, sgs, sg_next_chained, total_out, total_in, out_sgs, in_sgs, data, gfp); } EXPORT_SYMBOL_GPL(virtqueue_add_sgs); @@ -360,11 +374,35 @@ int virtqueue_add_outbuf(struct virtqueue *vq, void *data, gfp_t gfp) { - return virtqueue_add(vq, &sg,...

Hello all: We free old transmitted packets in ndo_start_xmit() currently, so any packet must be orphaned also there. This was used to reduce the overhead of tx interrupt to achieve better performance. But this may not work for some protocols such as TCP stream. TCP depends on the value of sk_wmem_alloc to implement various optimization for small packets stream such as TCP small queue and auto

Hello all: We free old transmitted packets in ndo_start_xmit() currently, so any packet must be orphaned also there. This was used to reduce the overhead of tx interrupt to achieve better performance. But this may not work for some protocols such as TCP stream. TCP depends on the value of sk_wmem_alloc to implement various optimization for small packets stream such as TCP small queue and auto

This fixes virtio on Xen guests as well as on any other platform that uses virtio_pci on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches,

This fixes virtio on Xen guests as well as on any other platform that uses virtio_pci on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches,

This fixes virtio on Xen guests as well as on any other platform that uses virtio_pci on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches,