On Fri, 6 Nov 2015, Armin Steinhoff wrote: > Thomas Gleixner schrieb: > > Now that read after a sequence of writes has the effect that the CPU > > has to wait for the writes to be finished before the read can take > > place. During that time the CPU just sits there and twiddles > > thumbs. It's a full stall. > > What means "the CPU" ? Does it mean ALL CPU cores are stalled ?? The CPU means the core on which the write/read sequence happened. But any other core which is doing a concurrent read over PCI-E even on an unrelated address space can be affected as well. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
