From: Timur Tabi <ttabi@interactivesi.com>
To: Roman Zippel <roman@augan.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: ioremap_nocache problem?
Date: Thu, 25 Jan 2001 10:49:50 -0600 [thread overview]
Message-ID: <20010125164707Z131181-222+39@kanga.kvack.org> (raw)
In-Reply-To: <3A705802.5C4DD2F2@augan.com>
** Reply to message from Roman Zippel <roman@augan.com> on Thu, 25 Jan 2001
17:44:51 +0100
> set_bit(PG_reserved, &page->flags);
> ioremap();
> ...
> iounmap();
> clear_bit(PG_reserved, &page->flags);
The problem with this is that between the ioremap and iounmap, the page is
reserved. What happens if that page belongs to some disk buffer or user
process, and some other process tries to free it. Won't that cause a problem?
--
Timur Tabi - ttabi@interactivesi.com
Interactive Silicon - http://www.interactivesi.com
When replying to a mailing-list message, please direct the reply to the mailing list only. Don't send another copy to me.
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next prev parent reply other threads:[~2001-01-25 16:49 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-23 10:30 Mark Mokryn
2001-01-23 16:53 ` Timur Tabi
2001-01-25 15:16 ` Stephen C. Tweedie
2001-01-25 15:56 ` Timur Tabi
2001-01-25 16:44 ` Roman Zippel
2001-01-25 16:49 ` Timur Tabi [this message]
2001-01-26 10:39 ` Stephen C. Tweedie
[not found] ` <20010125165001Z132264-460+11@vger.kernel.org>
2001-01-25 17:04 ` Jeff Hartmann
2001-01-25 17:11 ` Timur Tabi
[not found] ` <E14LpvQ-0008Pw-00@mail.valinux.com>
2001-01-25 17:47 ` Jeff Hartmann
2001-01-25 17:53 ` Timur Tabi
2001-01-26 10:43 ` Stephen C. Tweedie
2001-01-26 16:32 ` Eric W. Biederman
2001-01-26 19:22 ` Timur Tabi
[not found] ` <20010125175308Z130507-460+45@vger.kernel.org>
2001-01-25 18:13 ` Jeff Hartmann
2001-01-25 18:18 ` Timur Tabi
[not found] ` <E14Lqyt-0003z6-00@mail.valinux.com>
2001-01-25 18:46 ` Jeff Hartmann
[not found] ` <200101251556.f0PFuPd01743@mail.redhat.com>
2001-01-26 10:37 ` Stephen C. Tweedie
2001-01-23 18:12 ` Roman Zippel
2001-01-23 18:38 ` Timur Tabi
2001-01-24 0:50 ` David Wragg, David Wragg
2001-01-24 15:14 ` Timur Tabi
[not found] ` <E14LRce-0008FU-00@diver.doc.ic.ac.uk>
2001-01-24 15:39 ` David Wragg
[not found] ` <20010123183847Z131216-18594+636@vger.kernel.org>
2001-01-24 1:01 ` David Wragg
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