On Sat, Jul 26, 2008 at 01:38:13PM +0200, Andrea Arcangeli wrote: > > 1) absolute minimal intrusion into the kernel common code, and > absolute minimum number of branches added to the kernel fast > paths. Kernel is faster than your "minimal" type of notifiers when > they're disarmed. BTW. is this really significant? Having one branch per pte I don't think is necessarily slower than 2 branches per unmap. The 2 branches will use more icache and more branch history. One branch even once per pte in the unmapping loop is going to remain hot in icache and branch history isn't it? -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
