Re: [PATCH V2 2/2] vhost_net: conditionally enable tx polling

On 2016年05月30日 23:55, Michael S. Tsirkin wrote: On Mon, May 30, 2016 at 02:47:54AM -0400, Jason Wang wrote: We always poll tx for socket, this is sub optimal since: - it will be only used when we exceed the sndbuf of the socket. - since we use two independent polls for tx and vq, this will

Re: [PATCH V2 1/2] vhost_net: stop polling socket during rx processing

On 2016年05月30日 23:47, Michael S. Tsirkin wrote: On Mon, May 30, 2016 at 02:47:53AM -0400, Jason Wang wrote: We don't stop rx polling socket during rx processing, this will lead unnecessary wakeups from under layer net devices (E.g sock_def_readable() form tun). Rx will be slowed down in this

[PATCH v6v3 02/12] mm: migrate: support non-lru movable page migration

Per Vlastimi's review comment. Thanks for the detail review, Vlastimi! If you have another concern, feel free to say. After I resolve all thing, I will send v7 rebased on recent mmotm. >From b14aab2d3ac0702c7b2eec36409d74406d43 Mon Sep 17 00:00:00 2001 From: Minchan Kim

Re: PATCH v6v2 02/12] mm: migrate: support non-lru movable page migration

On Mon, May 30, 2016 at 11:36:07AM +0200, Vlastimil Babka wrote: > On 05/30/2016 03:39 AM, Minchan Kim wrote: > >After isolation, VM calls migratepage of driver with isolated page. > >The function of migratepage is to move content of the old page to new page > >and set up fields of struct page

Re: [PATCH V2 2/2] vhost_net: conditionally enable tx polling

On Mon, May 30, 2016 at 02:47:54AM -0400, Jason Wang wrote: > We always poll tx for socket, this is sub optimal since: > > - it will be only used when we exceed the sndbuf of the socket. > - since we use two independent polls for tx and vq, this will slightly > increase the waitqueue traversing

Re: [PATCH V2 1/2] vhost_net: stop polling socket during rx processing

On Mon, May 30, 2016 at 02:47:53AM -0400, Jason Wang wrote: > We don't stop rx polling socket during rx processing, this will lead > unnecessary wakeups from under layer net devices (E.g > sock_def_readable() form tun). Rx will be slowed down in this > way. This patch avoids this by stop polling

Re: [PATCH] virtio-gpu: fix output lookup

On Mon, May 30, 2016 at 02:03:26PM +0200, Gerd Hoffmann wrote: > Needed for multihead setups where we can have disabled > outputs and therefore plane->crtc can be NULL. > > Signed-off-by: Gerd Hoffmann See my reply in the other thread, but I think you have a more fundamental

Re: [PATCH v3 7/7] [wip] virtio-gpu: add page flip support

On Mon, May 30, 2016 at 02:06:50PM +0200, Gerd Hoffmann wrote: > Hi, > > > > But I'll take you up on the implied offer to help out and test ;-) > > > > git://people.freedesktop.org/~danvet/drm stuff > > Tried that branch. > > > Would be really awesome if you could test this on virtio. Note

Re: [PATCH] Add virtio gpu driver.

Hi, > - add a small core function to registerr HOT_X/HOT_Y for a (cursor) plane, > e.g. drm_plane_register_hotspot(). That should allocate the properties > (if they don't exist yet) and then attach those props to the cursor. We > don't want those props everywhere, but only on drivers that

Re: [PATCH v6 03/12] mm: balloon: use general non-lru movable page feature

On 05/20/2016 04:23 PM, Minchan Kim wrote: Now, VM has a feature to migrate non-lru movable pages so balloon doesn't need custom migration hooks in migrate.c and compaction.c. Instead, this patch implements page->mapping->a_ops->{isolate|migrate|putback} functions. With that, we could remove

Re: [PATCH v3 7/7] [wip] virtio-gpu: add page flip support

Hi, > > But I'll take you up on the implied offer to help out and test ;-) > > git://people.freedesktop.org/~danvet/drm stuff Tried that branch. > Would be really awesome if you could test this on virtio. Note that the > new nonblocking helpers require that your atomic backend gets the drm >

Re: PATCH v6v2 02/12] mm: migrate: support non-lru movable page migration

On 05/30/2016 03:39 AM, Minchan Kim wrote: After isolation, VM calls migratepage of driver with isolated page. The function of migratepage is to move content of the old page to new page and set up fields of struct page newpage. Keep in mind that you should clear PG_movable of oldpage via

Re: [PATCH v6 02/12] mm: migrate: support non-lru movable page migration

On 05/30/2016 03:33 AM, Minchan Kim wrote: + page->mapping = (void *)((unsigned long)page->mapping & + PAGE_MAPPING_MOVABLE); This should be negated to clear... use ~PAGE_MAPPING_MOVABLE ? No. The intention is to clear only mapping value but

Re: [PATCH v3 7/7] [wip] virtio-gpu: add page flip support

On Fri, May 27, 2016 at 09:50:27AM +0200, Daniel Vetter wrote: > On Fri, May 27, 2016 at 09:46:03AM +0200, Gerd Hoffmann wrote: > > On Mi, 2016-05-25 at 18:37 +0200, Daniel Vetter wrote: > > > On Fri, Oct 2, 2015 at 1:58 PM, Gerd Hoffmann wrote: > > > > Signed-off-by: Gerd

[PATCH V2 2/2] vhost_net: conditionally enable tx polling

We always poll tx for socket, this is sub optimal since: - it will be only used when we exceed the sndbuf of the socket. - since we use two independent polls for tx and vq, this will slightly increase the waitqueue traversing time and more important, vhost could not benefit from commit

[PATCH V2 1/2] vhost_net: stop polling socket during rx processing

We don't stop rx polling socket during rx processing, this will lead unnecessary wakeups from under layer net devices (E.g sock_def_readable() form tun). Rx will be slowed down in this way. This patch avoids this by stop polling socket during rx processing. A small drawback is that this introduces

[PATCH V2 0/2] vhost_net polling optimization

Hi: This series tries to optimize vhost_net polling at two points: - Stop rx polling for reduicng the unnecessary wakeups during handle_rx(). - Conditonally enable tx polling for reducing the unnecessary traversing and spinlock touching. Test shows about 17% improvement on rx pps. Please