Andi Kleen wrote:
One thing I was pondering was to replace the expensive popfs with
bt $IF,(%rsp)
jnc 1f
sti
1:
But would be mostly a P4 optimization again and I'm not 100% sure it is
worth it.
Worth it on 32-bit. On AMD64, probably not. On Intel 64-bit, maybe,
but less important than in P4 days.
This could change character completely if used at the tail of a function
where you now have
sti; 1: ret
Which generates an interrupt holdoff on the ret, an unusual thing to do.
Zach
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
