From: Pavel Machek <pavel@suse.cz>
To: Jens Axboe <axboe@suse.de>
Cc: kernel list <linux-kernel@vger.kernel.org>, seife@suse.de
Subject: Re: swsusp with highmem, testing wanted
Date: Fri, 26 Mar 2004 15:34:28 +0100 [thread overview]
Message-ID: <20040326143428.GB291@elf.ucw.cz> (raw)
In-Reply-To: <20040326140908.GD2929@suse.de>
Hi!
> > > > Which operations are allowed to access highmem? Can I rely on
> > > > block device read/write not accessing highmem?
> > >
> > > You mean modify highmem pages, or?
> >
> > I'd like to know this. Suppose I ask block subsystem to read from disk
> > into page @1.8GB. All the highmem contains trash. Will block subsystem
> > be able to work in this situation?
>
> We've never enforced anything like that, so you cannot rely on it. Block
> layer itself doesn't keep anything in high memory, and I cannot imagine
> any drivers that do either.
Well, if it is possible to enforce that it stays that way, it should
be possible to get something more inteligent for highmem.
Pavel
--
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]
next prev parent reply other threads:[~2004-03-26 14:35 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-24 23:57 Pavel Machek
2004-03-25 3:28 ` Benjamin Herrenschmidt
[not found] ` <20040325120250.GC300@elf.ucw.cz>
2004-03-25 22:41 ` Benjamin Herrenschmidt
2004-03-25 22:59 ` Pavel Machek
2004-03-25 22:44 ` Nigel Cunningham
2004-03-25 23:54 ` Pavel Machek
2004-03-25 23:06 ` Nigel Cunningham
2004-03-26 0:22 ` Benjamin Herrenschmidt
2004-03-25 3:48 ` Jeff Chua
[not found] ` <20040325073244.GE3377@suse.de>
[not found] ` <20040325115129.GB300@elf.ucw.cz>
[not found] ` <20040325121418.GK3377@suse.de>
2004-03-25 15:01 ` Pavel Machek
2004-03-25 15:27 ` Jens Axboe
2004-03-25 22:22 ` Pavel Machek
2004-03-26 14:09 ` Jens Axboe
2004-03-26 14:34 ` Pavel Machek [this message]
[not found] ` <20040325100339.GN791@holomorphy.com>
2004-03-25 21:59 ` Pavel Machek
2004-03-26 12:03 ` William Lee Irwin III
2004-03-26 12:08 ` Pavel Machek
2004-03-26 12:36 ` William Lee Irwin III
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=20040326143428.GB291@elf.ucw.cz \
--to=pavel@suse.cz \
--cc=axboe@suse.de \
--cc=linux-kernel@vger.kernel.org \
--cc=seife@suse.de \
/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®