search for: poison_pages

...poison_page(struct page *page) > { > void *addr = kmap_atomic(page); > @@ -37,6 +42,7 @@ static void poison_page(struct page *page) > memset(addr, PAGE_POISON, PAGE_SIZE); > kunmap_atomic(addr); > } > +EXPORT_SYMBOL_GPL(page_poisoning_enabled); > > static void poison_pages(struct page *page, int n) > { Looks like both the comment and the export are in the wrong place. I'm a bit concerned that callers also in fact poke at the PAGE_POISON - exporting that seems to be more of an accident as it's only used without page_poisoning.c - it might be better to hav...

...poison_page(struct page *page) > { > void *addr = kmap_atomic(page); > @@ -37,6 +42,7 @@ static void poison_page(struct page *page) > memset(addr, PAGE_POISON, PAGE_SIZE); > kunmap_atomic(addr); > } > +EXPORT_SYMBOL_GPL(page_poisoning_enabled); > > static void poison_pages(struct page *page, int n) > { Looks like both the comment and the export are in the wrong place. I'm a bit concerned that callers also in fact poke at the PAGE_POISON - exporting that seems to be more of an accident as it's only used without page_poisoning.c - it might be better to hav...

...s enabled, or false if not. + */ static void poison_page(struct page *page) { void *addr = kmap_atomic(page); @@ -37,6 +42,7 @@ static void poison_page(struct page *page) memset(addr, PAGE_POISON, PAGE_SIZE); kunmap_atomic(addr); } +EXPORT_SYMBOL_GPL(page_poisoning_enabled); static void poison_pages(struct page *page, int n) { -- 2.7.4

...{ >> void *addr = kmap_atomic(page); >> @@ -37,6 +42,7 @@ static void poison_page(struct page *page) >> memset(addr, PAGE_POISON, PAGE_SIZE); >> kunmap_atomic(addr); >> } >> +EXPORT_SYMBOL_GPL(page_poisoning_enabled); >> >> static void poison_pages(struct page *page, int n) >> { > Looks like both the comment and the export are in the wrong place. Thanks. Will be more careful. > I'm a bit concerned that callers also in fact poke at the > PAGE_POISON - exporting that seems to be more of an accident > as it's only u...

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

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 |

...-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 1c77d88..d95e5d3 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2469,11 +2469,13 @@ extern int apply_to_page_range(struct mm_struct *mm, unsigned long address, extern bool page_poisoning_enabled(void); extern void kernel_poison_pages(struct page *page, int numpages, int enable); extern bool page_is_poisoned(struct page *page); +extern bool page_poison_val_get(u8 *val); #else static inline bool page_poisoning_enabled(void) { return false; } static inline void kernel_poison_pages(struct page *page, int numpages, int ena...

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 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

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

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

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

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

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