On Fri, Jan 22, 2016 at 08:05:58AM -0500, Joshua Kinard wrote:
> > FWIW, attached is the test program I mentioned, which hits the first
> > part of this patch (flush_cache_range) via mprotect(2) and checks if
> > icache seems to have been flushed (tested on mips64r6, but should be
> > portable).
>
> Here's the output on my Octane, R14000 CPU (mips4):
>
> # ./mprotect
> Initial mprotect SUCCESS
> Looped { mprotect RW, modify, mprotect RX, test } SUCCESS
>
> This is without your patch applied. That look good? I'm assuming this CPU is
> too old to be affected. I can test with your patch after the blizzard is over
> later this weekend.
The R10000 family refills the I-cache from the S-cache so is not affected
by the scenario James' patch is for.
Ralf
