Messages in this thread | | | Date | Wed, 07 Feb 2018 15:26:38 +0800 | From | Wei Wang <> | Subject | Re: [PATCH v26 2/2 RESEND] virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT |
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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 <wei.w.wang@intel.com> >> Signed-off-by: Liang Li <liang.z.li@intel.com> >> Cc: Michael S. Tsirkin <mst@redhat.com> >> Cc: Michal Hocko <mhocko@kernel.org> >> --- >> 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.
Best, Wei
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