[lkml]   [2018]   [Feb]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v26 2/2 RESEND] virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT
On 02/07/2018 12:34 PM, Michael S. Tsirkin wrote:
> On Wed, Feb 07, 2018 at 11:01:06AM +0800, Wei Wang wrote:
>> Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_HINT feature indicates the
>> support of reporting hints of guest free pages to host via virtio-balloon.
>> Host requests the guest to report free page hints by sending a new cmd
>> id to the guest via the free_page_report_cmd_id configuration register.
>> When the guest starts to report, the first element added to the free page
>> vq is the cmd id given by host. When the guest finishes the reporting
>> of all the free pages, VIRTIO_BALLOON_FREE_PAGE_REPORT_STOP_ID is added
>> to the vq to tell host that the reporting is done. Host polls the free
>> page vq after sending the starting cmd id, so the guest doesn't need to
>> kick after filling an element to the vq.
>> Host may also requests the guest to stop the reporting in advance by
>> sending the stop cmd id to the guest via the configuration register.
>> Signed-off-by: Wei Wang <>
>> Signed-off-by: Liang Li <>
>> Cc: Michael S. Tsirkin <>
>> Cc: Michal Hocko <>
>> ---
>> drivers/virtio/virtio_balloon.c | 255 +++++++++++++++++++++++++++++++-----
>> include/uapi/linux/virtio_balloon.h | 7 +
>> mm/page_poison.c | 6 +
>> 3 files changed, 232 insertions(+), 36 deletions(-)
>> Resend Change:
>> - Expose page_poisoning_enabled to kernel modules
> RESEND tag is for reposting unchanged patches.
> you want to post a v27, and you want the mm patch
> as a separate one, so you can get an ack on it from
> someone on linux-mm.
> In fact, I would probably add reporting the poison value as
> a separate feature/couple of patches.

OK. I have made them separate patches in v27. Thanks a lot for reviewing
so many versions, I learned a lot from the comments and discussion.


 \ /
  Last update: 2018-02-07 08:24    [W:0.258 / U:1.648 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site