Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-25 Thread Jason Wang
On 2018/12/25 下午8:52, Michael S. Tsirkin wrote: On Tue, Dec 25, 2018 at 06:09:19PM +0800, Jason Wang wrote: On 2018/12/25 上午2:12, Michael S. Tsirkin wrote: On Mon, Dec 24, 2018 at 04:32:39PM +0800, Jason Wang wrote: On 2018/12/14 下午8:33, Michael S. Tsirkin wrote: On Fri, Dec 14, 2018 at 11:

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-25 Thread Michael S. Tsirkin
On Tue, Dec 25, 2018 at 06:09:19PM +0800, Jason Wang wrote: > > On 2018/12/25 上午2:12, Michael S. Tsirkin wrote: > > On Mon, Dec 24, 2018 at 04:32:39PM +0800, Jason Wang wrote: > > > On 2018/12/14 下午8:33, Michael S. Tsirkin wrote: > > > > On Fri, Dec 14, 2018 at 11:42:18AM +0800, Jason Wang wrote:

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-25 Thread Jason Wang
On 2018/12/25 上午2:12, Michael S. Tsirkin wrote: On Mon, Dec 24, 2018 at 04:32:39PM +0800, Jason Wang wrote: On 2018/12/14 下午8:33, Michael S. Tsirkin wrote: On Fri, Dec 14, 2018 at 11:42:18AM +0800, Jason Wang wrote: On 2018/12/13 下午11:27, Michael S. Tsirkin wrote: On Thu, Dec 13, 2018 at 06

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-24 Thread Michael S. Tsirkin
On Mon, Dec 24, 2018 at 04:44:14PM +0800, Jason Wang wrote: > > On 2018/12/17 上午3:57, Michael S. Tsirkin wrote: > > On Sat, Dec 15, 2018 at 11:43:08AM -0800, David Miller wrote: > > > From: Jason Wang > > > Date: Fri, 14 Dec 2018 12:29:54 +0800 > > > > > > > On 2018/12/14 上午4:12, Michael S. Tsir

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-24 Thread Michael S. Tsirkin
On Mon, Dec 24, 2018 at 04:32:39PM +0800, Jason Wang wrote: > > On 2018/12/14 下午8:33, Michael S. Tsirkin wrote: > > On Fri, Dec 14, 2018 at 11:42:18AM +0800, Jason Wang wrote: > > > On 2018/12/13 下午11:27, Michael S. Tsirkin wrote: > > > > On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote:

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-24 Thread Jason Wang
On 2018/12/17 上午3:57, Michael S. Tsirkin wrote: On Sat, Dec 15, 2018 at 11:43:08AM -0800, David Miller wrote: From: Jason Wang Date: Fri, 14 Dec 2018 12:29:54 +0800 On 2018/12/14 上午4:12, Michael S. Tsirkin wrote: On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: Hi: This series

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-24 Thread Jason Wang
On 2018/12/14 下午8:33, Michael S. Tsirkin wrote: On Fri, Dec 14, 2018 at 11:42:18AM +0800, Jason Wang wrote: On 2018/12/13 下午11:27, Michael S. Tsirkin wrote: On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: Hi: This series tries to access virtqueue metadata through kernel virtual

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-16 Thread Michael S. Tsirkin
On Sat, Dec 15, 2018 at 11:43:08AM -0800, David Miller wrote: > From: Jason Wang > Date: Fri, 14 Dec 2018 12:29:54 +0800 > > > > > On 2018/12/14 上午4:12, Michael S. Tsirkin wrote: > >> On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: > >>> Hi: > >>> > >>> This series tries to access vi

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-15 Thread David Miller
From: Jason Wang Date: Fri, 14 Dec 2018 12:29:54 +0800 > > On 2018/12/14 上午4:12, Michael S. Tsirkin wrote: >> On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: >>> Hi: >>> >>> This series tries to access virtqueue metadata through kernel virtual >>> address instead of copy_user() frien

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-14 Thread Michael S. Tsirkin
On Fri, Dec 14, 2018 at 07:33:20AM -0500, Michael S. Tsirkin wrote: > > - unsafe_put_user/unsafe_get_user is not sufficient for accessing structures > > (e.g accessing descriptor) or arrays (batching). > > So you want unsafe_copy_xxx_user? I can do this. Hang on will post. Like this basically? Wa

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-14 Thread Michael S. Tsirkin
On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: > 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. > > Test shows a

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-14 Thread Michael S. Tsirkin
On Fri, Dec 14, 2018 at 12:29:54PM +0800, Jason Wang wrote: > > On 2018/12/14 上午4:12, Michael S. Tsirkin wrote: > > On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: > > > Hi: > > > > > > This series tries to access virtqueue metadata through kernel virtual > > > address instead of copy

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-14 Thread Michael S. Tsirkin
On Fri, Dec 14, 2018 at 11:42:18AM +0800, Jason Wang wrote: > > On 2018/12/13 下午11:27, Michael S. Tsirkin wrote: > > On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: > > > Hi: > > > > > > This series tries to access virtqueue metadata through kernel virtual > > > address instead of cop

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-13 Thread Jason Wang
On 2018/12/14 上午4:12, Michael S. Tsirkin wrote: On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: 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 har

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-13 Thread Jason Wang
On 2018/12/13 下午11:27, Michael S. Tsirkin wrote: On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: 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 ha

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-13 Thread Michael S. Tsirkin
On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: > 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. > > Test shows a

Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-13 Thread Michael S. Tsirkin
On Thu, Dec 13, 2018 at 06:10:19PM +0800, Jason Wang wrote: > 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. Userspace access

[PATCH net-next 0/3] vhost: accelerate metadata access through vmap()

2018-12-13 Thread Jason Wang
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. Test shows about 24% improvement on TX PPS. It should benefit other cases as well. Plea