Messages in this thread | | | Date | Mon, 18 Jan 1999 23:48:48 -0800 | From | "David S. Miller" <> | Subject | Re: Linux and physical memory |
| |
From: Jakub Jelinek <jj@sunsite.ms.mff.cuni.cz> Date: Tue, 19 Jan 1999 08:37:54 +0100 (CET)
Also, if you add PG_highmem, I bet current page_alloc will suck badly (even the way how is PG_dma done now is very unefficient).
No, it's actually pretty simple. The difference is that PG_dma "must" get a PG_dma page. Whereas PG_highmem says such a page is "OK" if that is what you happen to find.
This means that all that is needed is to treat PG_highmem pages as if you didn't see them at all if the __get_free_pages() does not say that they are ok.
I don't claim that this will be fast, but it will be simple and work.
Later, David S. Miller davem@dm.cobaltmicro.com
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |