From: Dave Hansen <dave@sr71.net>
To: Christoph Lameter <cl@gentwo.org>,
ksummit-discuss@lists.linuxfoundation.org
Subject: Re: [Ksummit-discuss] [CORE TOPIC] Redesign Memory Management layer and more core subsystem
Date: Wed, 11 Jun 2014 13:52:08 -0700 [thread overview]
Message-ID: <5398C178.7080704@sr71.net> (raw)
In-Reply-To: <alpine.DEB.2.10.1406111336240.9616@gentwo.org>
On 06/11/2014 12:03 PM, Christoph Lameter wrote:
> 4. Swap: No one really wants to swap today. This needs to be replaced with
> something else. Going heavily into swap is akin to locking up the system.
> There are numerous band aid solutions but nothing appealing. Maybe the
> best idea is the Android idea of the saving app state and removing it from
> memory.
Yeah, our entire approach is getting a bit dated, and I think it's
really designed around the fact that our swap devices have historically
been (relatively) painfully slow to access.
There are some patches in mm to _help_, but currently if you throw a
really fast swap device in a system and try to swap heavily to it, you
don't get anywhere near saturating the device.
We'd probably be better off if we just blasted data at the device and
just ignored the LRU.
next prev parent reply other threads:[~2014-06-11 20:52 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-11 19:03 Christoph Lameter
2014-06-11 19:26 ` Daniel Phillips
2014-06-11 19:45 ` Greg KH
2014-06-12 13:35 ` John W. Linville
2014-06-13 16:57 ` Christoph Lameter
2014-06-13 17:31 ` Greg KH
2014-06-13 17:59 ` Christoph Lameter
2014-06-13 19:18 ` Stephen Hemminger
2014-06-13 22:30 ` Christoph Lameter
2014-06-13 16:56 ` Christoph Lameter
2014-06-13 17:30 ` Greg KH
2014-06-13 17:55 ` James Bottomley
2014-06-13 18:41 ` Christoph Lameter
2014-06-16 11:39 ` Thomas Petazzoni
2014-06-16 14:05 ` Christoph Lameter
2014-06-16 14:09 ` Thomas Petazzoni
2014-06-16 14:28 ` Christoph Lameter
2014-06-13 18:01 ` Christoph Lameter
2014-06-13 18:25 ` Greg KH
2014-06-13 18:54 ` Christoph Lameter
2014-06-11 20:08 ` josh
2014-06-11 20:15 ` Andy Lutomirski
2014-06-11 20:52 ` Dave Hansen [this message]
2014-06-12 6:59 ` Phillip Lougher
2014-06-13 17:02 ` Christoph Lameter
2014-06-13 21:36 ` Benjamin Herrenschmidt
2014-06-13 22:23 ` Rik van Riel
2014-06-13 23:04 ` Christoph Lameter
2014-06-14 1:19 ` Phillip Lougher
2014-06-16 14:04 ` Christoph Lameter
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=5398C178.7080704@sr71.net \
--to=dave@sr71.net \
--cc=cl@gentwo.org \
--cc=ksummit-discuss@lists.linuxfoundation.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