From: Ralf Baechle <ralf@oss.sgi.com>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Carsten Langgaard <carstenl@mips.com>,
linux-mips@fnet.fr, linux-mips@oss.sgi.com
Subject: Re: [patch] MIPS64 R4k TLB refill CP0 hazards
Date: Thu, 1 Aug 2002 19:18:04 +0200 [thread overview]
Message-ID: <20020801191804.D22824@dea.linux-mips.net> (raw)
In-Reply-To: <Pine.GSO.3.96.1020801171104.8256E-100000@delta.ds2.pg.gda.pl>; from macro@ds2.pg.gda.pl on Thu, Aug 01, 2002 at 05:24:43PM +0200
On Thu, Aug 01, 2002 at 05:24:43PM +0200, Maciej W. Rozycki wrote:
> After looking at the generated assembly I discovered the handlers don't
> fit in 128 bytes. They didn't crash since I have modules disabled for
> now, so the vmalloc path didn't get hit and the user path happened to fit,
> but it was pure luck. The path got hit before I fixed a bug in gas though
> -- that's the explanation of the false cache error exceptions I used to
> observe.
Ouch. It was a known problem but we simply ignored it for a while as that
handler just overwrites the cache error handler which normally should be
used extremly rarely, if at all. The problem is somewhat itching by now
as we're supporting the SB1 core which in it's revision one may throw
spurious cache errors, so the handler is actually used ...
Ralf
next prev parent reply other threads:[~2002-08-01 17:16 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-29 15:23 [patch] MIPS64 R4k TLB refill CP0 hazards Maciej W. Rozycki
2002-07-29 20:10 ` Carsten Langgaard
2002-07-30 6:59 ` Carsten Langgaard
2002-07-30 11:29 ` Ralf Baechle
2002-07-30 12:09 ` Carsten Langgaard
2002-07-30 12:44 ` Maciej W. Rozycki
2002-07-30 22:47 ` Ralf Baechle
2002-07-31 11:34 ` Maciej W. Rozycki
2002-07-31 20:31 ` Ralf Baechle
2002-08-01 15:24 ` Maciej W. Rozycki
2002-08-01 17:18 ` Ralf Baechle [this message]
2002-08-02 9:32 ` Carsten Langgaard
2002-08-02 11:05 ` Ralf Baechle
2002-08-02 11:09 ` Carsten Langgaard
2002-07-30 12:39 ` Kevin D. Kissell
2002-07-30 12:39 ` Kevin D. Kissell
2002-07-31 2:05 ` Ralf Baechle
2002-07-31 7:28 ` Kevin D. Kissell
2002-07-31 7:28 ` Kevin D. Kissell
2002-07-31 11:49 ` Maciej W. Rozycki
2002-07-31 18:22 ` Ralf Baechle
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