From: "Stojaczyk, DariuszX" <dariuszx.stojaczyk@intel.com>
To: Alejandro Lucero <alejandro.lucero@netronome.com>
Cc: dev <dev@dpdk.org>,
"Burakov, Anatoly" <anatoly.burakov@intel.com>,
"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] memory: do not use base-virtaddr in secondary processes
Date: Mon, 18 Jun 2018 20:12:03 +0000 [thread overview]
Message-ID: <FBE7E039FA50BF47A673AD0BD3CD56A846160678@HASMSX105.ger.corp.intel.com> (raw)
In-Reply-To: <CAD+H993g6CVaP0B4XZg=mMbrmiZzrBW6ymR8eDM4FPwtcU3FZg@mail.gmail.com>
> -----Original Message-----
> From: Alejandro Lucero [mailto:alejandro.lucero@netronome.com]
> Sent: Monday, June 18, 2018 9:33 PM
>
> On Mon, Jun 18, 2018 at 8:03 PM, Stojaczyk, DariuszX
> <dariuszx.stojaczyk@intel.com <mailto:dariuszx.stojaczyk@intel.com> >
> wrote:
>
> Can you point me out to an NFP guide or some code that describes
> this in more detail?
>
>
>
> As I said, I'm working on a RFC. I will send something shortly. But I could give
> you an advance: the hugepages needs to be mapped below certain virtual
> address, 1TB, and I'm afraid that includes the primary and also the
> secondary processes. At least if any process can send or receive packets
> to/from a NFP.
>
>
Thanks, I'm pretty sure we're safe, then.
>
> If we're talking about base-virtaddr for hugepages, then that's always
> inherited from the primary process, regardless of what base-virtaddr is
> supplied to the secondary.
>
>
>
>
> But, is not your patch avoiding to use that base-virtaddr for secondary
> processes?
I see now that the patch name is slightly misleading. Maybe I shouldn’t pick such a catchy title. Let me clarify: As of DPDK 18.05, --base-virtaddr param for secondary process applications only affects that shadow memseg metadata that's not useful for anyone, but can still do a lot of harm. Hugepage memory in secondary processes is always mapped to the same addresses the primary process uses.
D.
next prev parent reply other threads:[~2018-06-18 20:12 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-18 19:53 [dpdk-stable] " Dariusz Stojaczyk
2018-06-18 17:21 ` [dpdk-stable] [dpdk-dev] " Alejandro Lucero
2018-06-18 19:03 ` Stojaczyk, DariuszX
2018-06-18 19:33 ` Alejandro Lucero
2018-06-18 20:12 ` Stojaczyk, DariuszX [this message]
2018-06-19 9:24 ` Burakov, Anatoly
2018-06-19 10:23 ` Alejandro Lucero
2018-06-19 10:27 ` Burakov, Anatoly
2018-06-19 11:48 ` Alejandro Lucero
2018-06-19 9:21 ` [dpdk-stable] " Burakov, Anatoly
2018-07-12 22:08 ` [dpdk-stable] [dpdk-dev] " Thomas Monjalon
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