Hi David,
>
> Mark inflated and never onlined pages PG_offline, to tell the world that
> the content is stale and should not be dumped.
>
> Cc: "K. Y. Srinivasan"
> Cc: Haiyang Zhang
> Cc: Stephen Hemminger
> Cc: Kairui Song
> Cc: Vitaly Kuznetsov
> Cc: Andrew Morton
> Cc: Matthew Wilcox
> >> ---
> >> drivers/hv/hv_balloon.c | 14 --
> >> 1 file changed, 12 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
> >> index 211f3fe3a038..47719862e57f 100644
> >> --- a/drivers/hv/hv_balloon.c
> >> +++ b/drivers/hv/hv_ballo
ng, do we need to care for clearing PageOffline flag before
> > > freeing
> > > a balloon'd page?
> >
> > Yes we have to otherwise the code will crash when trying to set PageBuddy.
> >
> > (only one page type at a time may be set right now, and it makes sense.
> > A page that is offline cannot e.g. be a buddy page)
>
> o.k
> >
> > So PageOffline is completely managed by the page owner.
>
> Makes sense. Thanks for explaining.
Looks good to me.
Acked-by: Pankaj gupta
23
> #define KPF_ZERO_PAGE24
> #define KPF_IDLE 25
> #define KPF_PGTABLE 26
> diff --git a/tools/vm/page-types.c b/tools/vm/page-types.c
> index 37908a83ddc2..6c38d3b862e4 100644
> --- a/tools/vm/page-types.c
> +++ b/tools/vm/page-types.c
> @@ -133,7 +133,7 @@ static const char * const page_flag_names[] = {
> [KPF_NOPAGE]= "n:nopage",
> [KPF_KSM] = "x:ksm",
> [KPF_THP] = "t:thp",
> - [KPF_BALLOON] = "o:balloon",
> + [KPF_OFFLINE] = "o:offline",
> [KPF_PGTABLE] = "g:pgtable",
> [KPF_ZERO_PAGE] = "z:zero_page",
> [KPF_IDLE] = "i:idle_page",
> --
> 2.17.2
Acked-by: Pankaj gupta
>
>
> 2017-11-07 4:26 GMT+08:00 Eduardo Valentin :
> > Currently, the existing qspinlock implementation will fallback to
> > test-and-set if the hypervisor has not set the PV_UNHALT flag.
> >
> > This patch gives the opportunity to guest kernels to select
> > between test-and-set and the regular queu
> Subject: Re: [PATCHv3 1/1] locking/qspinlock/x86: Avoid test-and-set when
> PV_DEDICATED is set
>
> On Thu, Nov 09, 2017 at 05:05:36PM +0100, Radim Krcmar wrote:
> > 2017-11-09 10:53-0500, Pankaj Gupta:
> > > 2] PV TLB should also behave as per option PV_DEDICATED f
