From: Catalin Marinas <catalin.marinas@xxxxxxx> Date: Thu, 26 May 2016 15:20:58 +0100 > We can solve (a) by adding more __SC_WRAP annotations in the generic > unistd.h. ... I really think it's much more robust to clear the tops of the registers by default. Then you won't be auditing constantly and adding more and more wrappers. You can't even quantify the performance gains for me in any precise way. Whatever you gain by avoiding the 64-bit decompostion/reconstitution for those few system calls with 64-bit registers, you are losing by calling the wrappers for more common system calls, more often. "it's more natural to pass 64-bit values in a register" is not a clear justification for this change. This looks way over engineered to me. -- 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
