From: Nicholas Piggin <npiggin@gmail.com>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: 4.13-rc3: Unrecoverable exception 4100
Date: Sat, 5 Aug 2017 23:39:17 +1000 [thread overview]
Message-ID: <20170805233917.72e49d2f@roar.ozlabs.ibm.com> (raw)
In-Reply-To: <877eyjkt0u.fsf@linux-m68k.org>
On Fri, 04 Aug 2017 21:54:57 +0200
Andreas Schwab <schwab@linux-m68k.org> wrote:
> No, this is really a 4.13-rc1 regression.
>
> Andreas.
>
SLB miss with MSR[RI]=0 on
lbz r0,THREAD+THREAD_LOAD_FP(r7)
Caused by bc4f65e4cf9d6cc43e0e9ba0b8648cf9201cd55f
Hmm, I'll see if something can be done, but that MSR_RI stuff in syscall
exit makes things fairly difficult (and will reduce performance improvement
of this patch anyway).
I'm trying to work to a point where we have a soft-RI bit for these kinds of
uses that would avoid all this complexity. Until then it may be best to
just revert this patch.
Thanks for the report
next prev parent reply other threads:[~2017-08-05 13:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87vam3lhtn.fsf__12885.8019285419$1501844971$gmane$org@linux-m68k.org>
2017-08-04 19:39 ` 4.13-rc3: Unrecoverable exception 4100 Andreas Schwab
[not found] ` <87fud7ktqf.fsf__17563.3519575515$1501875675$gmane$org@linux-m68k.org>
2017-08-04 19:54 ` Andreas Schwab
2017-08-05 13:39 ` Nicholas Piggin [this message]
2017-08-07 9:56 ` Michael Ellerman
2017-08-07 10:26 ` Nicholas Piggin
2017-08-07 11:49 ` Michael Ellerman
2017-08-07 10:40 ` Andreas Schwab
2017-08-07 11:20 ` Michael Ellerman
2017-08-04 10:59 Andreas Schwab
2017-08-04 13:00 ` Benjamin Herrenschmidt
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