From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from post-23.mail.nl.demon.net (post-23.mail.nl.demon.net [194.159.73.193]) by ozlabs.org (Postfix) with ESMTP id 7BF2167C86 for ; Tue, 28 Nov 2006 10:12:50 +1100 (EST) Date: Tue, 28 Nov 2006 00:12:46 +0100 From: Rutger Nijlunsing To: Benjamin Herrenschmidt Subject: Re: powerpc.git build error Message-ID: <20061127231246.GA6192@nospam.com> References: <20061125225807.GA10510@nospam.com> <1164523183.10222.1.camel@localhost.localdomain> <20061126190609.GA20291@nospam.com> <20061126210535.GA5639@nospam.com> <1164597365.22055.2.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1164597365.22055.2.camel@localhost.localdomain> Cc: linuxppc-dev@ozlabs.org, paulus@samba.org, Guennadi Liakhovetski Reply-To: linuxppc-dev@tux.tmfweb.nl List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, Nov 27, 2006 at 02:16:04PM +1100, Benjamin Herrenschmidt wrote: > > > Hold your horses, I'm just a simple user without too much > > understanding of the hardware trying to get most out of his PowerBook > > G3 Lombard (with broken L2 cache: 33bogomips) which I got a week ago :) > > What makes you think it has a broken L2 cache ? During the time Mac OS9 was on this machine, the machine would occasionaly boot with a window displaying a message along the lines 'problem with memory'. I forgot the exact error message, but it involved memory in general (so not L2 specific). When the message would not display, the machine would hang randomly after some time (say, 1 hour). I was told the Apple Store owner suggested swapping the motherboard to fix it, but I don't know the expertise of him either. I got this hang once in Linux and I seem to remember /proc/cpuinfo containing a line 'L2 cache: 1024Kb' or something like that. After that first hang, I cannot find the L2-cache line in /proc/cpuinfo any more _and_ I did not have a single hang (apart from during rebooting). Actually I hoped to be able to play with the l2cr values (whatever valid values might be for this machine), but I cannot find the corresponding /proc/sys/kernel/l2cr which should exist according to Documentation/sysctl/kernel.txt . It might be that a smaller value (say, 512Kb) might still work. I don't know. Furthermore the machine feels sluggish. A kernel compile takes ~5.5 hours, while the same compile on my P4 takes ~10 minutes. But it might be normal for a 400Mhz G3, I don't know... > The 33 bogomips are > totally unrelated, it's the timebase frequency. Bogomips are NOT a > benchmark and on the powerpc architecture, and not even related to the > processor speed at all (but to the frequency of the timebase input). Goolging around for 'lombard bogomips' I got the impression the value should be 600 to 800, or at least of that order of magnitude. Since 33 is far outside this range, I thought that to be the reason. Apparently not, then... > > It seems suspend-to-ram is working to some extend, or at least > > 'should' work out-of-the-box. When I close the lid and reopen it, it > > resumes 'a little': PCMCIA cards seem to power up again (TX/RX WiFi > > led starts to flash again), but the screen stays dark. I haven't tried > > to debug this yet, since getting WiFi to work > > Does it work better without the PCMCIA card ? Is it properly going to > sleep (snoozing LED) ? Also make sure you are using the proper video > driver (atyfb on the lombard) and not booting with "novideo" or > "video=ofonly". Ok, I got further with this one thanks to you :) Suspend-to-RAM works like a charm! However, when it wakes up the screen is black (and I thought the suspend had crashed...). With fn-F2 (increase brightness key) I can make the screen visible again. > > Furthermore I'm not interested in kexec if 'all is working'. But since > > 'rebooting' already hangs after the powerdown, I'm more focused on > > getting the normal 'reboot' working. > > That is the strange thing... does it reboot fine in MacOS ? Uhm, I got this second-hand machine 1.5 weeks ago, and I wiped MacOS in day one. So I cannot remember. It also looses track of date/time once in a while (not always!) after pressing the reset-button on the back (which I need to bring it back to life). How am I supposed to power down the machine? halt -p? With 'powerprefs' I can only select different suspend modes but not power-down modes... This leaves me to some OOPSes still: - removing the PCMCIA wifi card (Orinoco) while the network is up - booting the machine with the wifi card inserted - bringing up the wifi card while no access point is found (maybe-related:) And a warning in dmesg which reads (no OOPS): pcmcia: the driver needs updating to supported shared IRQ lines. ...which corresponds to /proc/interrupts : 22: 4912397 PMAC-PIC Level yenta, pcmcia0.0 The wifi-at-startup-OOPS: pccard: PCMCIA card inserted into slot 0 cs: memory probe 0x0c0000-0x0fffff: excluding 0xc0000-0xfffff cs: memory probe 0x60000000-0x60ffffff: excluding 0x60000000-0x60ffffff cs: memory probe 0x80000000-0xfcffffff: excluding 0x80000000-0x81ffffff cs: memory probe 0xfd000000-0xfdffffff:Machine check in kernel mode. Caused by (from SRR1=49030): Transfer error ack signal Oops: Machine check, sig: 7 [#1] ... Call Trace: [D30ABD40] [D5044E90] pcmcia_read_cis_mem+0x15c/0x274 [pcmcia_core] (unreliable) [D30ABD70] [D5045110] read_cis_cache+0x168/0x16c [pcmcia_core] [D30ABD90] [D50452B8] pccard_get_next_tuple+0x100/0x454 [pcmcia_core] [D30ABDD0] [D50456A4] pccard_get_first_tuple+0x98/0x144 [pcmcia_core] ... When I insert the PCMCIA card at a later stage, there are no 'cs: ' lines in dmesg at all. So still some riddles to be solved ;) -- Rutger Nijlunsing ---------------------------------- eludias ed dse.nl never attribute to a conspiracy which can be explained by incompetence ----------------------------------------------------------------------