Re: ioremap_nocache problem?

From: Timur Tabi (ttabi@interactivesi.com)
Date: Thu Jan 25 2001 - 11:49:50 EST

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** 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

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