From: Penny Zheng <Penny.Zheng@arm.com>
To: Julien Grall <julien@xen.org>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
"sstabellini@kernel.org" <sstabellini@kernel.org>
Cc: Bertrand Marquis <Bertrand.Marquis@arm.com>, Wei Chen <Wei.Chen@arm.com>
Subject: RE: [PATCH 4/9] xen/arm: static memory initialization
Date: Tue, 6 Jul 2021 09:20:23 +0000 [thread overview]
Message-ID: <VE1PR08MB5215AB836DE8B8943C4A040CF71B9@VE1PR08MB5215.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <f4836b6e-cbb3-ef9d-1d15-a6ec75d985d2@xen.org>
Hi Julien
> -----Original Message-----
> From: Julien Grall <julien@xen.org>
> Sent: Tuesday, July 6, 2021 5:10 PM
> To: Penny Zheng <Penny.Zheng@arm.com>; xen-devel@lists.xenproject.org;
> sstabellini@kernel.org; jbeulich@suse.com
> Cc: Bertrand Marquis <Bertrand.Marquis@arm.com>; Wei Chen
> <Wei.Chen@arm.com>
> Subject: Re: [PATCH 4/9] xen/arm: static memory initialization
>
>
>
> On 05/07/2021 08:28, Penny Zheng wrote:
> > Hi Julien
>
> Hi Penny,
>
> >> -----Original Message-----
> >> From: Julien Grall <julien@xen.org>
> >> Sent: Thursday, July 1, 2021 2:10 AM
> >> To: Penny Zheng <Penny.Zheng@arm.com>;
> >> xen-devel@lists.xenproject.org; sstabellini@kernel.org;
> >> jbeulich@suse.com
> >> Cc: Bertrand Marquis <Bertrand.Marquis@arm.com>; Wei Chen
> >> <Wei.Chen@arm.com>
> >> Subject: Re: [PATCH 4/9] xen/arm: static memory initialization
> >>
> >> Hi Penny,
> >>
> >> On 07/06/2021 03:43, Penny Zheng wrote:
> >>> This patch introduces static memory initialization, during system
> >>> RAM boot
> >> up.
> >>
> >> The word "RAM" looks spurious.
> >>
> >
> > Thx. I check the "spurious" in dictionary, it means fake? So I will leave
> "during system boot up"
> > here.
>
> Yes, this reads better.
>
> >>> 2. scrub the page in need synchronously.
> >>
> >> Can you explain why this is necessary?
> >>
> >
> > Since I'm borrowing the logic in free_heap_pages, I'm also trying to cover all
> the scenarios here like it does.
> > So I assume that free_staticmem_page will not only be used on initialization,
> but also when destroying/rebooting the domain.
> > On these cases, it is necessary to scrub the page, ig.
>
> I wasn't asking about scrubbing specifically but instead why it is synchronous.
> Sorry for the confusion.
>
I've read asynchronous scrubbing in buddy allocator, pages that need a scrub are added to tail,
and specific working thread is working on it, hmm, imo, I don't think it could be simply applied into static
memory. :/
So I put asynchronous scrubbing in #TODO.
> Cheers,
>
> --
> Julien Grall
Cheers
--
Penny Zheng
next prev parent reply other threads:[~2021-07-06 9:21 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-07 2:43 [PATCH V2 0/9] Domain on Static Allocation Penny Zheng
2021-06-07 2:43 ` [PATCH 1/9] xen/arm: introduce domain " Penny Zheng
2021-06-07 2:43 ` [PATCH 2/9] xen/arm: introduce PGC_reserved Penny Zheng
2021-06-30 17:44 ` Julien Grall
2021-07-05 3:09 ` Penny Zheng
2021-06-07 2:43 ` [PATCH 3/9] xen/arm: introduce CONFIG_STATIC_ALLOCATION Penny Zheng
2021-06-07 6:17 ` Jan Beulich
2021-06-30 17:45 ` Julien Grall
2021-07-05 3:16 ` Penny Zheng
2021-06-07 2:43 ` [PATCH 4/9] xen/arm: static memory initialization Penny Zheng
2021-06-10 9:35 ` Jan Beulich
2021-06-30 17:46 ` Julien Grall
2021-07-05 5:22 ` Penny Zheng
2021-07-05 7:14 ` Penny Zheng
2021-07-05 7:50 ` Jan Beulich
2021-07-05 9:19 ` Penny Zheng
2021-07-05 7:48 ` Jan Beulich
2021-06-30 18:09 ` Julien Grall
2021-07-05 7:28 ` Penny Zheng
2021-07-06 9:09 ` Julien Grall
2021-07-06 9:20 ` Penny Zheng [this message]
2021-07-06 9:26 ` Julien Grall
2021-06-07 2:43 ` [PATCH 5/9] xen: introduce assign_pages_nr Penny Zheng
2021-06-10 9:49 ` Jan Beulich
2021-06-30 18:29 ` Julien Grall
2021-07-01 8:26 ` Jan Beulich
2021-07-01 9:24 ` Julien Grall
2021-07-01 10:13 ` Jan Beulich
2021-06-07 2:43 ` [PATCH 6/9] xen/arm: introduce alloc_staticmem_pages and alloc_domstatic_pages Penny Zheng
2021-06-10 10:23 ` Jan Beulich
2021-07-06 5:58 ` Penny Zheng
2021-07-06 6:53 ` Jan Beulich
2021-07-06 9:39 ` Julien Grall
2021-07-06 9:59 ` Jan Beulich
2021-07-06 10:31 ` Julien Grall
2021-07-08 9:09 ` Penny Zheng
2021-07-08 10:06 ` Jan Beulich
2021-07-08 11:07 ` Penny Zheng
2021-06-07 2:43 ` [PATCH 7/9] xen/arm: take care of concurrency on static memory allocation Penny Zheng
2021-06-10 10:53 ` Jan Beulich
2021-06-07 2:43 ` [PATCH 8/9] xen/arm: check `xen,static-mem` property during domain construction Penny Zheng
2021-07-03 13:26 ` Julien Grall
2021-07-06 6:31 ` Penny Zheng
2021-07-06 6:57 ` Jan Beulich
2021-07-06 7:35 ` Penny Zheng
2021-07-06 9:22 ` Julien Grall
2021-06-07 2:43 ` [PATCH 9/9] xen/arm: introduce allocate_static_memory Penny Zheng
2021-07-03 14:18 ` Julien Grall
2021-07-06 7:30 ` Penny Zheng
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