From: linmiaohe <linmiaohe@huawei.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
Vitaly Wool <vitaly.wool@konsulko.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [Question Resend] About z3fold page migration
Date: Tue, 13 Oct 2020 01:46:57 +0000 [thread overview]
Message-ID: <5558810ec33b4b8e92145f66a4922be8@huawei.com> (raw)
Matthew Wilcox <willy@infradead.org> wrote:
> On Mon, Oct 12, 2020 at 02:00:17PM +0000, linmiaohe wrote:
>> Hi all:
>>
>> Many thanks for brilliant z3fold code. I am reading it and have some questions about it. It's very nice of you if you can explain it for me.
>> 1.page->private is used in z3fold but PagePrivate flag is never set, should we SetPagePrivate for it?
>
>No. SetPagePrivate and page->private are related in interesting and complicated ways. I'm working on some documentation for it at the moment, but the short answer is: no.
I can't wait to read your document. PagePrivate confuses me now.
>
>> 2.Since PagePrivate flag is never set, why we ClearPagePrivate in free_z3fold_page and z3fold_page_migrate?
>
>That's probably a bug.
>
>
>> 3.Should we add page to the unbuddied list in z3fold_page_putback()
>> when zhdr->refcount does not reach 0 since we remove it from unbuddied list in z3fold_page_isolate? Or When we will add page to the unbuddied list after z3fold_page_putback?
>
>This one I do not know the answer to.
>
Many thanks for your reply. Enjoy your day! ;)
next reply other threads:[~2020-10-13 1:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-13 1:46 linmiaohe [this message]
-- strict thread matches above, loose matches on Subject: below --
2020-10-12 14:00 linmiaohe
2020-10-12 14:04 ` Matthew Wilcox
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5558810ec33b4b8e92145f66a4922be8@huawei.com \
--to=linmiaohe@huawei.com \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=vitaly.wool@konsulko.com \
--cc=willy@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox