John Baldwin wrote:
On Wednesday 07 February 2007 04:58:17 am Daniel O'Connor wrote:
On Wednesday 07 February 2007 19:23, Artem Kuchin wrote:
FreeBSD/amd64 is a very young platform on FreeBSD. While the core FreeBSD
kernel and base system components are generally fairly robust, there are
likely to still be rough edges, particularly with third party packages."
scares me. Do you really think it is better than PAE?
PAE is quite young as well, I think it was committed to the tree around March
2003. The earliest AMD64 commit I could find was May 2003 although repo
copying makes it confusing..
I think you'll find the list of drivers incompatible with PAE to be much
longer with amd64.
Err, amd64 and PAE are the same problem for drivers (dealing with 64-bit
physical addresses for DMA which can require bounce buffering if your
hardware only supports 32-bit physical addresses). The fix is to use
the bus_dma abstraction in the driver instead of directly using vtophys()
and a driver needs that fix for both PAE and amd64. amr(4) should work
fine with both PAE and amd64 with > 4GB of RAM.
Actually, they are different problems. There are all sorts of fun ways
for a driver to be 64-bit unclean in ways that will make it work with
amd64 but not with PAE.
Scott
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