From: Ralf Baechle <ralf@linux-mips.org>
To: Joshua Kinard <kumba@gentoo.org>
Cc: linux-mips@linux-mips.org
Subject: Re: 16k or 64k PAGE_SIZE and "illegal instruction" (signal -4) errors
Date: Tue, 26 Aug 2014 14:11:29 +0200 [thread overview]
Message-ID: <20140826121129.GC24146@linux-mips.org> (raw)
In-Reply-To: <53FC7790.80602@gentoo.org>
On Tue, Aug 26, 2014 at 08:03:28AM -0400, Joshua Kinard wrote:
> Yeah, coherency shouldn't be a problem for the Octane. hardware-coherent
> like IP27.
>
> The icache snooping fix is already enabled in
> arch/mips/include/asm/mach-ip30/cpu-feature-overrides.h:
>
> #define cpu_icache_snoops_remote_store 1
>
> SMP is not working yet on IP30, though. I gave up on that for now, because
> I can't get the second CPU to start ticking properly.
Are you running a preemptible kernel?
You could also change the definition of cpu_icache_snoops_remote_store to 0
for testing. That should make things just a bit slower but otherwise have
not impact. Would be interesting to see if that makes the SIGs go away.
Ralf
next prev parent reply other threads:[~2014-08-26 12:11 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-26 9:27 16k or 64k PAGE_SIZE and "illegal instruction" (signal -4) errors Joshua Kinard
2014-08-26 10:20 ` Ralf Baechle
2014-08-26 10:42 ` Maciej W. Rozycki
2014-08-26 10:49 ` Maciej W. Rozycki
2014-08-26 11:49 ` Ralf Baechle
2014-08-26 12:03 ` Joshua Kinard
2014-08-26 12:11 ` Ralf Baechle [this message]
2014-08-26 11:06 ` Joshua Kinard
2014-08-26 11:50 ` Maciej W. Rozycki
2014-08-26 12:03 ` Ralf Baechle
2014-08-26 13:16 ` Joshua Kinard
2014-08-26 14:02 ` Ralf Baechle
2014-08-27 0:53 ` Joshua Kinard
2014-09-04 3:35 ` Joshua Kinard
2014-08-26 14:03 ` Ralf Baechle
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