similar to: [PATCH] mm/page_poison: move PAGE_POISON to page_poison.c

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

On Fri 09-02-18 16:08:14, Wei Wang wrote: > The PAGE_POISON macro is used in page_poison.c only, so avoid exporting > it. Also remove the "mm/debug-pagealloc.c" related comment, which is > obsolete. Why is this an improvement? I thought the whole point of poison.h is to keep all the poison value at a single place to make them obviously unique. > Signed-off-by: Wei Wang

Move the PAGE_POISON value to page_poison.c and add a function to enable callers from a kernel module to get the poison value if the page poisoning feature is in use. This also avoids callers directly checking PAGE_POISON regardless of whether the feature is enabled. Signed-off-by: Wei Wang <wei.w.wang at intel.com> Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Michal Hocko

On Wed, Feb 07, 2018 at 02:54:30PM +0800, Wei Wang wrote: > In some usages, e.g. virtio-balloon, a kernel module needs to know if > page poisoning is in use. This patch exposes the page_poisoning_enabled > function to kernel modules. > > Signed-off-by: Wei Wang <wei.w.wang at intel.com> > Cc: Andrew Morton <akpm at linux-foundation.org> > Cc: Michal Hocko

On Wed, Feb 07, 2018 at 02:54:30PM +0800, Wei Wang wrote: > In some usages, e.g. virtio-balloon, a kernel module needs to know if > page poisoning is in use. This patch exposes the page_poisoning_enabled > function to kernel modules. > > Signed-off-by: Wei Wang <wei.w.wang at intel.com> > Cc: Andrew Morton <akpm at linux-foundation.org> > Cc: Michal Hocko

On 02/08/2018 02:34 AM, Michael S. Tsirkin wrote: > On Wed, Feb 07, 2018 at 02:54:30PM +0800, Wei Wang wrote: >> In some usages, e.g. virtio-balloon, a kernel module needs to know if >> page poisoning is in use. This patch exposes the page_poisoning_enabled >> function to kernel modules. >> >> Signed-off-by: Wei Wang <wei.w.wang at intel.com> >> Cc:

In some usages, e.g. virtio-balloon, a kernel module needs to know if page poisoning is in use. This patch exposes the page_poisoning_enabled function to kernel modules. Signed-off-by: Wei Wang <wei.w.wang at intel.com> Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Michal Hocko <mhocko at kernel.org> Cc: Michael S. Tsirkin <mst at redhat.com> --- mm/page_poison.c |

In some usages, e.g. virtio-balloon, a kernel module needs to know if page poisoning is in use. This patch exposes the page_poisoning_enabled function to kernel modules. Signed-off-by: Wei Wang <wei.w.wang at intel.com> Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Michal Hocko <mhocko at kernel.org> Cc: Michael S. Tsirkin <mst at redhat.com> --- mm/page_poison.c |

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.

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.

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

On Mon, Apr 27, 2020 at 8:09 AM David Hildenbrand <david at redhat.com> wrote: > > On 27.04.20 16:58, Alexander Duyck wrote: > > On Mon, Apr 27, 2020 at 1:08 AM David Hildenbrand <david at redhat.com> wrote: > >> > >> On 24.04.20 18:24, Alexander Duyck wrote: > >>> From: Alexander Duyck <alexander.h.duyck at linux.intel.com> >

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

On Mon, Apr 27, 2020 at 1:08 AM David Hildenbrand <david at redhat.com> wrote: > > On 24.04.20 18:24, Alexander Duyck wrote: > > From: Alexander Duyck <alexander.h.duyck at linux.intel.com> > > > > We should disable free page reporting if page poisoning is enabled in the > > kernel but we cannot report it via the balloon interface. This way we can >

On Mon, Apr 27, 2020 at 1:08 AM David Hildenbrand <david at redhat.com> wrote: > > On 24.04.20 18:24, Alexander Duyck wrote: > > From: Alexander Duyck <alexander.h.duyck at linux.intel.com> > > > > We should disable free page reporting if page poisoning is enabled in the > > kernel but we cannot report it via the balloon interface. This way we can >

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

The following changes since commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d: Linux 4.19 (2018-10-22 07:37:37 +0100) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to 79f800b2e76923cd8ce0aa659cb5c019d9643bc9: MAINTAINERS: remove reference to bogus vsock file (2018-10-24 21:16:14 -0400)