From: "Burakov, Anatoly" <anatoly.burakov@intel.com>
To: David Marchand <david.marchand@redhat.com>, dev@dpdk.org
Cc: echaudro@redhat.com, aconole@redhat.com,
maxime.coquelin@redhat.com, stable@dpdk.org,
Andrea Arcangeli <aarcange@redhat.com>
Subject: Re: [dpdk-stable] [PATCH] mem: mark pages as not accessed when reserving VA
Date: Tue, 10 Mar 2020 16:26:58 +0000 [thread overview]
Message-ID: <88daf308-e774-598d-4341-c6b6d4e161eb@intel.com> (raw)
In-Reply-To: <20200309145442.28926-1-david.marchand@redhat.com>
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@dpdk.org
>
> Suggested-by: Andrea Arcangeli <aarcange@redhat.com>
> Signed-off-by: David Marchand <david.marchand@redhat.com>
> ---
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
--
Thanks,
Anatoly
next prev parent reply other threads:[~2020-03-10 16:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-09 14:54 David Marchand
2020-03-09 15:27 ` Maxime Coquelin
2020-03-10 13:57 ` Aaron Conole
2020-03-10 16:26 ` Burakov, Anatoly [this message]
2020-03-13 9:59 ` David Marchand
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