Arjan van de Ven <[email protected]> writes:
>
> not on kernel entry afaik.
> However just save the register on the stack and put it back at the
> end...
You need to do more than that, like disabling lazy FPU mode.
That is what kernel_fpu_begin/end takes care of.
However it disables preemption, which especially for bigger
copies will probably make the low latency people unhappy.
Without disabling preemption there is no way to use SSE right now.
Note that there is also an integer NT store in SSE1, however at least
in Athlon K7 it is microcoded and very slow.
-Andi
-
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/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |