From: Matthew Wilcox <willy@infradead.org>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Xu Yu <xuyu@linux.alibaba.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
hughd@google.com, akpm@linux-foundation.org,
gavin.dg@linux.alibaba.com
Subject: Re: [PATCH v2] mm, thp: use head page in __migration_entry_wait
Date: Tue, 8 Jun 2021 13:32:21 +0100 [thread overview]
Message-ID: <YL9jVYgWYBydOYst@casper.infradead.org> (raw)
In-Reply-To: <20210608120026.ugfh72ydjeba44bo@box.shutemov.name>
On Tue, Jun 08, 2021 at 03:00:26PM +0300, Kirill A. Shutemov wrote:
> But there's one quirk: if split succeed we effectively wait on wrong
> page to be unlocked. And it may take indefinite time if split_huge_page()
> was called on the head page.
Hardly indefinite time ... callers of split_huge_page_to_list() usually
unlock the page soon after. Actually, I can't find one that doesn't call
unlock_page() within a few lines of calling split_huge_page_to_list().
next prev parent reply other threads:[~2021-06-08 12:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-08 9:22 Xu Yu
2021-06-08 12:00 ` Kirill A. Shutemov
2021-06-08 12:32 ` Matthew Wilcox [this message]
2021-06-08 12:58 ` Kirill A. Shutemov
2021-06-08 13:35 ` Matthew Wilcox
2021-06-09 9:59 ` Kirill A. Shutemov
2021-06-08 13:22 ` Yu Xu
2021-06-09 10:08 ` Kirill A. Shutemov
2021-06-08 20:00 ` Hugh Dickins
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=YL9jVYgWYBydOYst@casper.infradead.org \
--to=willy@infradead.org \
--cc=akpm@linux-foundation.org \
--cc=gavin.dg@linux.alibaba.com \
--cc=hughd@google.com \
--cc=kirill@shutemov.name \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=xuyu@linux.alibaba.com \
/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
all inboxes | Powered by JetHome®