Messages in this thread |  | | Subject | Re: 2.4.13-pre5-aa1 O_DIRECT drastic HIGHMEM performance hit | Date | Thu, 25 Oct 2001 18:20:35 +0100 (BST) | From | Alan Cox <> |
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> Are we stuck with a low mem configuration or are there workarounds that > would allow us to stick with the initial 2GB of RAM and still get ~200 > MB/sec.
Jens has patches for doing direct DMA I/O from highmem pages. That should basically nullify that hit. Doing that mainstream is a 2.5 thing really - 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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