Re: [Xen-devel] [PATCH v1] x86/mm: Supresses vm_events caused by page-walks

[Tamas K Lengyel <tamas@xxxxxxxxxxxxx>]

On Mon, Oct 30, 2017 at 4:32 AM, Alexandru Isaila
<aisaila@xxxxxxxxxxxxxxx> wrote:
> This patch is adding a way to enable/disable nested pagefault
> events. It introduces the xc_monitor_nested_pagefault function
> and adds the nested_pagefault_disabled in the monitor structure.
> This is needed by the introspection so it will only get gla
> faults and not get spammed with other faults.
> In p2m_set_ad_bits the v->arch.sse_pg_dirty.eip and
> v->arch.sse_pg_dirty.gla are used to mark that this is the
> second time a fault occurs and the dirty bit is set.

Could you describe under what conditions do you get these other faults?

Thanks,
Tamas

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