Re: [v3,11/41] mips: reuse asm-generic/barrier.h

From: Leonid Yegoshin
Date: Wed Jan 27 2016 - 19:59:17 EST


On 01/27/2016 03:26 AM, Maciej W. Rozycki wrote:
On Fri, 15 Jan 2016, Leonid Yegoshin wrote:

So you need to build a different kernel for some types of MIPS systems?
Or do you do boot-time rewriting, like a number of other arches do?
I don't know. I would like to have responses. Ralf asked Maciej about old
systems and that came nowhere. Even rewrite - don't know what to do with that:
no lightweight SYNC or no SYNC at all - yes, it is still possible that SYNC on
some systems can be too heavy or even harmful, nobody tested that.
I don't recall being asked; mind that I might not get to messages I have
not been cc-ed in a timely manner and I may miss some altogether. With
the amount of mailing list traffic that passes by me my scanner may fail
to trigger. Sorry if this causes anybody trouble, but such is life.

Coincidentally, I have just posted some notes on SYNC in a different
thread, see <http://lkml.iu.edu/hypermail/linux/kernel/1601.3/03080.html>.
There's a reference to an older message of mine there too. I hope this
answers your questions.

Maciej
In http://patchwork.linux-mips.org/patch/10505/the very last mesg exchange is:

Maciej,

do you have an R4000 / R4600 / R5000 / R7000 / SiByte system at hand to
test this?
...
Ralf

Maciej W. Rozycki- June 5, 2015, 9:18 p.m.

On Fri, 5 Jun 2015, Ralf Baechle wrote:

do you have an R4000 / R4600 / R5000 / R7000 / SiByte system at hand to
test this?

I should be able to check R4400 (that is virtually the same as R4000)
next week or so. As to SiByte -- not before next month I'm afraid. I
don't have access to any of the other processors you named. You may
want to find a better person if you want to accept this change soon.

Maciej

... and that stops forever...

- Leonid.