On Fri, 27 Apr 2007, Nick Piggin wrote: > For the TLB issue, higher order pagecache doesn't help. If distros > ship with a 4K page size on powerpc, and use some larger pages in > the pagecache, some people are still going to get angry because > they wanted to use 64K pages... But I agree 64K pages is too big > for most things anyway, and 16 would be better as a default (which > hopefully x86-64 will get one day).
Powerpc supports multiple pagesizes. Maybe we could make mmap use those page sizes some day if we had a variable order page cache. Your stands on the issue means that powerpc will be forever crippled and not be able to use its full potential. > Anyway, for io performance, there are alternatives, dispite what > some people seem to be saying. We can submit larger sglists to the > device for larger ios, which Jens is looking at (which could help > all types of workloads, not just those with sequential large file > IO). Right this could help but it is not addressing the basic requirement for devices that need large contiguuos chunks of memory for I/O. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
