similar to: [PATCH] virtio-balloon: Delete an unnecessary check before the function call "iput"

With CONFIG_BALLOON_COMPACTION=y, it will mount balloon_mnt for balloon page migration when probe a virtio_balloon device, however do not unmount it when remove the device, fix it. Fixes: b1123ea6d3b3 ("mm: balloon: use general non-lru movable page feature") Signed-off-by: Yisheng Xie <xieyisheng1 at huawei.com> --- drivers/virtio/virtio_balloon.c | 4 ++++ 1 file changed, 4

With CONFIG_BALLOON_COMPACTION=y, it will mount balloon_mnt for balloon page migration when probe a virtio_balloon device, however do not unmount it when remove the device, fix it. Fixes: b1123ea6d3b3 ("mm: balloon: use general non-lru movable page feature") Signed-off-by: Yisheng Xie <xieyisheng1 at huawei.com> --- drivers/virtio/virtio_balloon.c | 4 ++++ 1 file changed, 4

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 hooks for ballooning in general migration functions and make balloon compaction simple. Cc: virtualization at

Add a new feature, VIRTIO_BALLOON_F_PAGE_CHUNKS, which enables the transfer of the ballooned (i.e. inflated/deflated) pages in chunks to the host. The implementation of the previous virtio-balloon is not very efficient, because the ballooned pages are transferred to the host one by one. Here is the breakdown of the time in percentage spent on each step of the balloon inflating process (inflating

Now, VM has a feature to migrate non-lru movable pages so balloon doesn't need custom migration hooks in migrate.c and compact.c. Instead, this patch implements page->mapping ->{isolate|migrate|putback} functions. With that, we could remove hooks for ballooning in general migration functions and make balloon compaction simple. Cc: virtualization at lists.linux-foundation.org Cc: Rafael

On Thu, May 04, 2017 at 04:50:12PM +0800, Wei Wang wrote: > Add a new feature, VIRTIO_BALLOON_F_PAGE_CHUNKS, which enables > the transfer of the ballooned (i.e. inflated/deflated) pages in > chunks to the host. > > The implementation of the previous virtio-balloon is not very > efficient, because the ballooned pages are transferred to the > host one by one. Here is the

On Thu, May 04, 2017 at 04:50:12PM +0800, Wei Wang wrote: > Add a new feature, VIRTIO_BALLOON_F_PAGE_CHUNKS, which enables > the transfer of the ballooned (i.e. inflated/deflated) pages in > chunks to the host. > > The implementation of the previous virtio-balloon is not very > efficient, because the ballooned pages are transferred to the > host one by one. Here is the

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 hooks for ballooning in general migration functions and make balloon compaction simple. Cc: virtualization at

Add a new vq to report hints of guest free pages to the host. Signed-off-by: Wei Wang <wei.w.wang at intel.com> Signed-off-by: Liang Li <liang.z.li at intel.com> --- drivers/virtio/virtio_balloon.c | 164 ++++++++++++++++++++++++++++++------ include/uapi/linux/virtio_balloon.h | 1 + 2 files changed, 140 insertions(+), 25 deletions(-) diff --git

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 command to the guest via setting the VIRTIO_BALLOON_HOST_CMD_FREE_PAGE_HINT bit of the host_cmd config register. As the first step here, virtio-balloon only reports free page hints from

Add a new feature, VIRTIO_BALLOON_F_PAGE_CHUNKS, which enables the transfer of the ballooned (i.e. inflated/deflated) pages in chunks to the host. The implementation of the previous virtio-balloon is not very efficient, because the ballooned pages are transferred to the host one by one. Here is the breakdown of the time in percentage spent on each step of the balloon inflating process (inflating

Now, VM has a feature to migrate non-lru movable pages so balloon doesn't need custom migration hooks in migrate.c and compact.c. Instead, this patch implements page->mapping ->{isolate|migrate|putback} functions. With that, we could remove hooks for ballooning in general migration functions and make balloon compaction simple. Cc: virtualization at lists.linux-foundation.org Cc: Rafael

Add a new feature, VIRTIO_BALLOON_F_BALLOON_CHUNKS, which enables the transfer of the ballooned (i.e. inflated/deflated) pages in chunks to the host. The implementation of the previous virtio-balloon is not very efficient, because the ballooned pages are transferred to the host one by one. Here is the breakdown of the time in percentage spent on each step of the balloon inflating process

On Wed, Oct 18, 2017 at 07:59:23PM +0900, Tetsuo Handa wrote: > Tetsuo Handa wrote: > > 20171016-deflate.log.xz continued printing "puff" messages without any OOM > > killer messages, for fill_balloon() always inflates faster than leak_balloon() > > deflates. > > > > Since the OOM killer cannot be invoked unless leak_balloon() completely > >

> > Add a new vq to report hints of guest free pages to the host. > > Signed-off-by: Wei Wang <wei.w.wang at intel.com> > Signed-off-by: Liang Li <liang.z.li at intel.com> > --- > drivers/virtio/virtio_balloon.c | 164 > ++++++++++++++++++++++++++++++------ > include/uapi/linux/virtio_balloon.h | 1 + > 2 files changed, 140 insertions(+), 25

> > Add a new vq to report hints of guest free pages to the host. > > Signed-off-by: Wei Wang <wei.w.wang at intel.com> > Signed-off-by: Liang Li <liang.z.li at intel.com> > --- > drivers/virtio/virtio_balloon.c | 164 > ++++++++++++++++++++++++++++++------ > include/uapi/linux/virtio_balloon.h | 1 + > 2 files changed, 140 insertions(+), 25

Add a new feature, VIRTIO_BALLOON_F_SG, which enables the transfer of balloon (i.e. inflated/deflated) pages using scatter-gather lists to the host. The implementation of the previous virtio-balloon is not very efficient, because the balloon pages are transferred to the host one by one. Here is the breakdown of the time in percentage spent on each step of the balloon inflating process (inflating

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 pages 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

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.