search for: page_mapping_remote

...Wilcox wrote: > On Fri, Aug 09, 2019 at 07:00:26PM +0300, Adalbert Laz?r wrote: >> +++ b/include/linux/page-flags.h >> @@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY) >> */ >> #define PAGE_MAPPING_ANON 0x1 >> #define PAGE_MAPPING_MOVABLE 0x2 >> +#define PAGE_MAPPING_REMOTE 0x4 > Uh. How do you know page->mapping would otherwise have bit 2 clear? > Who's guaranteeing that? > > This is an awfully big patch to the memory management code, buried in > the middle of a gigantic series which almost guarantees nobody would > look at it. I call shen...

...Wilcox wrote: > On Fri, Aug 09, 2019 at 07:00:26PM +0300, Adalbert Laz?r wrote: >> +++ b/include/linux/page-flags.h >> @@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY) >> */ >> #define PAGE_MAPPING_ANON 0x1 >> #define PAGE_MAPPING_MOVABLE 0x2 >> +#define PAGE_MAPPING_REMOTE 0x4 > Uh. How do you know page->mapping would otherwise have bit 2 clear? > Who's guaranteeing that? > > This is an awfully big patch to the memory management code, buried in > the middle of a gigantic series which almost guarantees nobody would > look at it. I call shen...

On Fri, Aug 09, 2019 at 07:00:26PM +0300, Adalbert Laz?r wrote: > +++ b/include/linux/page-flags.h > @@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY) > */ > #define PAGE_MAPPING_ANON 0x1 > #define PAGE_MAPPING_MOVABLE 0x2 > +#define PAGE_MAPPING_REMOTE 0x4 Uh. How do you know page->mapping would otherwise have bit 2 clear? Who's guaranteeing that? This is an awfully big patch to the memory management code, buried in the middle of a gigantic series which almost guarantees nobody would look at it. I call shenanigans. > @@ -1021,7 +10...

...g 09, 2019 at 07:00:26PM +0300, Adalbert Laz?r wrote: > >> +++ b/include/linux/page-flags.h > >> @@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY) > >> */ > >> #define PAGE_MAPPING_ANON 0x1 > >> #define PAGE_MAPPING_MOVABLE 0x2 > >> +#define PAGE_MAPPING_REMOTE 0x4 > > Uh. How do you know page->mapping would otherwise have bit 2 clear? > > Who's guaranteeing that? > > > > This is an awfully big patch to the memory management code, buried in > > the middle of a gigantic series which almost guarantees nobody would >...

...--git a/include/linux/page-flags.h b/include/linux/page-flags.h index 39b4494e29f1..3f65b2833562 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY) */ #define PAGE_MAPPING_ANON 0x1 #define PAGE_MAPPING_MOVABLE 0x2 +#define PAGE_MAPPING_REMOTE 0x4 #define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE) -#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE) +#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE | \ + PAGE_MAPPING_REMOTE) static __always_inline int PageMappingFlags(struct...

...e/linux/page-flags.h > > > > > > @@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY) > > > > > > */ > > > > > > #define PAGE_MAPPING_ANON 0x1 > > > > > > #define PAGE_MAPPING_MOVABLE 0x2 > > > > > > +#define PAGE_MAPPING_REMOTE 0x4 > > > > > > > > > > Uh. How do you know page->mapping would otherwise have bit 2 > > clear? > > > > > Who's guaranteeing that? > > > > > > > > > > This is an awfully big patch to the memory management code,...

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place