Re: [PATCH 3/3] early_printk: Add simple serialization to early_vprintk()
From: Steven Rostedt
Date: Wed Oct 04 2017 - 11:02:40 EST
On Wed, 4 Oct 2017 16:52:47 +0200
Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> On Wed, Oct 04, 2017 at 10:43:54AM -0400, Steven Rostedt wrote:
> > My question is not about ordering, but about coherency. Can you have
> > one CPU read a variable that goes into cache, and keep using the cached
> > variable every time the program asks to read it, instead of going out
> > to memory.
> No, not on a coherent system.
In this case.
Reviewed-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>