From: Matthew Wilcox <willy@infradead.org>
To: Samuel Thibault <samuel.thibault@ens-lyon.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Arnd Bergmann <arnd@arndb.de>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [RFC] Re: Costless huge virtual memory? /dev/same, /dev/null?
Date: Thu, 13 Apr 2017 09:34:11 -0700 [thread overview]
Message-ID: <20170413163411.GH784@bombadil.infradead.org> (raw)
In-Reply-To: <20170413162946.jxyzfdggia2gge76@var.youpi.perso.aquilenet.fr>
On Thu, Apr 13, 2017 at 06:29:46PM +0200, Samuel Thibault wrote:
> (Ideally we'd be able to take the MAP_HUGETLB mmap flag into account to
> map a single huge page repeatedly, even lowering the populating cost,
> but AIUI of the current hugepage support it would be far from easy)
You could implement ->map_pages instead of (or as well as) ->fault, which
would lower your costs if that is a concern. I think the eventual intent
is that map_pages would be able to populate a PMD or even a PUD.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2017-04-13 16:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-29 16:28 Samuel Thibault
2017-04-13 9:42 ` [RFC] " Samuel Thibault
2017-04-13 16:29 ` Samuel Thibault
2017-04-13 16:34 ` Matthew Wilcox [this message]
2017-04-13 17:04 ` Samuel Thibault
2017-04-13 18:37 ` Greg Kroah-Hartman
2017-04-13 18:43 ` Samuel Thibault
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=20170413163411.GH784@bombadil.infradead.org \
--to=willy@infradead.org \
--cc=arnd@arndb.de \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=samuel.thibault@ens-lyon.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