Messages in this thread | | | Date | Fri, 27 Jan 2006 21:12:16 +0100 | From | Pierre Ossman <> | Subject | Re: How to map high memory for block io |
| |
Russell King wrote:
> > > > I don't see what the problem is. A sg entry is a list of struct page > > pointers, an offset, and a size. As such, it can't describe a transfer > > which crosses a page because such a structure does not imply that one > > struct page follows another struct page. > > > > >
If the pages do not strictly follow each other then there is a lot of broken code in the kernel. drivers/mmc/mmci.c and drivers/block/ub.c being two occurences since both assume they can access the entire entry through a single mapping.
Rgds Pierre
- 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/
| |