On Wed, May 23, 2007 at 02:13:24PM -0700, Yu, Fenghua wrote: > Yes, in theory, sharing shared percpu data with local percpu data in one > cache line can cause cache line contention between remote and local > access.
What's "shared percpu data" ? It sounds to me like a contradiction in terms. Isn't percpu data supposed to only be accessed by the CPU which owns it to prevent cache line bouncing? In which case, what's the point of sharing that data with other CPUs? Surely "shared percpu data" is just the same as normal data? -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: - 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/
