Messages in this thread | | | Date | Sun, 6 Jan 2002 05:11:34 -0800 | From | William Lee Irwin III <> | Subject | Re: [PATCH] Remove 8 bytes from struct page on 64bit archs |
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On Sun, Jan 06, 2002 at 11:39:14PM +1100, Anton Blanchard wrote: > It seems shortening struct page is all the rage at the moment and I > didnt want to be left out. On some 64bit architectures (sparc64 and > ppc64 for example) all memory is allocated in the DMA zone. Therefore > there is no reason to waste 8 bytes per page when every page points to > the same zone!
Very true. I devised something to address this that appears to work on multiple architectures already by folding ->zone into ->flags, which could be useful. (Dave Jones recommended I just let arch maintainers for things other than i386 mess with page_address() for other arches.) OTOH, I'm more interested in getting it trimmed down than getting credit.
Cheers, Bill
P.S.:
My i386 version, which makes ->virtual conditional on CONFIG_HIGHMEM as well, is at:
ftp://ftp.kernel.org/pub/linux/kernel/people/wli/vm/struct_page/struct_page-2.4.17-rc2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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