[dpdk-stable] [PATCH] mem: mark pages as not accessed when reserving VA

[Burakov, Anatoly]

On 09-Mar-20 2:54 PM, David Marchand wrote:
> When the memory allocator reserves virtual addresses, it still does not
> know what they will be used for.
> Besides, huge areas are reserved for memory hotplug in multiprocess
> setups. But most of the pages are unused in the whole life of the
> processes.
> 
> Change protection mode to PROT_NONE when only reserving VA.
> The memory allocator already switches to the right mode when making use
> of it.
> 
> It also has the nice effect of getting those pages skipped by the kernel
> when calling mlockall() or when a coredump gets generated.
> 
> Cc: stable at dpdk.org
> 
> Suggested-by: Andrea Arcangeli <aarcange at redhat.com>
> Signed-off-by: David Marchand <david.marchand at redhat.com>
> ---

Acked-by: Anatoly Burakov <anatoly.burakov at intel.com>

-- 
Thanks,
Anatoly