Re: Kernel page count management

• Next message: Alan Cox: "Re: DMA on the MVP3"
• Previous message: Jamie Lokier: "Re: Assembler?"
• In reply to: Mathias Waack: "Kernel page count management"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

On Mon, 7 Feb 2000, Mathias Waack wrote:

> If I request a page by calling get_free_page, the kernel
> sets the usage count for this page to 1. So far so good, but if
> I request more pages by calling __get_free_pages(GFP...,order)
> it sets only the usage count of the first returned page.

Higher-order pages are "special".

They are used for special-purpose things and they are not
freeable by kswapd or anything else except the code that
requested the pages in the first place.

There is no real need to mark the other pages as used
since they've been removed from the free list and nobody
will see those pages (except the code that has allocated
them).

regards,

Rik

--
The Internet is not a network of computers. It is a network
of people. That is its real strength.
-
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/

• Next message: Alan Cox: "Re: DMA on the MVP3"
• Previous message: Jamie Lokier: "Re: Assembler?"
• In reply to: Mathias Waack: "Kernel page count management"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Mon Feb 07 2000 - 21:00:15 EST