From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Giuseppe Sacco <giuseppe@sguazz.it>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>
Subject: Re: kernel since 5.6 do not boot anymore on Apple PowerBook
Date: Wed, 26 Aug 2020 12:10:32 +0200 [thread overview]
Message-ID: <87b46754-db63-fa71-bbea-35ac9c8931ce@csgroup.eu> (raw)
In-Reply-To: <e7a620fa7521e84e2010660b87f20dd24a3b0cd4.camel@sguazz.it>
Hello Giuseppe,
Le 24/08/2020 à 22:48, Giuseppe Sacco a écrit :
> Hello Christophe,
>
> Il giorno lun, 24/08/2020 alle 07.17 +0200, Christophe Leroy ha
> scritto:
>> Hello Giuseppe,
> [...]
>> The Oopses in the video are fixed in 5.9-rc2, see my response to your
>> other mail.
>
> Right, I just updated from git and rebuilt the kernel whith
> CONFIG_VMAP_STACK not set and the machine boots correctly.
>
>> So now we know that your kernel doesn't boot when CONFIG_VMAP_STACK is set.
>> Can you remind the exact problem ?
>
> latest kernel with CONFIG_VMAP_STACK set stops after writing:
> pmac32_cpufreq: registering PowerMac CPU frequency driver
> pmac32_cpufreq: Low: 667 MHz, High: 867 Mhz, Boot: 667 MHz
>
>> One common problem with CONFIG_VMAP_STACK is when some drivers are
>> invalidly using buffers in stack for DMA.
>>
>> Couldn't try with CONFIG_DEBUG_VIRTUAL (without CONFIG_VMAP_STACK) and
>> see if it triggers some warnings ?
>
> I've just tried: it boots without any special warning. What should I
> look for? This is an excerpt of dmesg output about the line it would
> otherwise stop:
If there is no warning, then the issue is something else, bad luck.
Could you increase the loglevel and try again both with and without
VMAP_STACK ? Maybe we'll get more information on where it stops.
Christophe
>
> [...]
> [ 6.566984] PowerMac i2c bus pmu 2 registered
> [ 6.574879] PowerMac i2c bus pmu 1 registered
> [ 6.582634] PowerMac i2c bus mac-io 0 registered
> [ 6.590323] i2c i2c-2: No i2c address for /pci@f2000000/mac-io@17/i2c@18000/i2c-modem
> [ 6.598290] PowerMac i2c bus uni-n 1 registered
> [ 6.606196] i2c i2c-3: i2c-powermac: modalias failure on /uni-n@f8000000/i2c@f8001000/cereal@1c0
> [ 6.614320] PowerMac i2c bus uni-n 0 registered
> [ 6.622501] pmac32_cpufreq: Registering PowerMac CPU frequency driver
> [ 6.630580] pmac32_cpufreq: Low: 667 Mhz, High: 867 Mhz, Boot: 667 Mhz
> [ 6.639518] ledtrig-cpu: registered to indicate activity on CPUs
> [ 6.647894] NET: Registered protocol family 10
> [ 6.656492] Segment Routing with IPv6
> [ 6.664490] mip6: Mobile IPv6
> [ 6.672337] NET: Registered protocol family 17
> [ 6.680213] mpls_gso: MPLS GSO support
> [...]
>
> Bye,
> Giuseppe
>
next prev parent reply other threads:[~2020-08-26 22:22 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-07 12:58 kernel since 5.6 do not boot anymore on Apple PowerBook Giuseppe Sacco
2020-07-07 13:35 ` Christophe Leroy
2020-07-07 14:03 ` Giuseppe Sacco
2020-07-07 14:52 ` Christophe Leroy
2020-07-07 15:34 ` Giuseppe Sacco
2020-07-08 7:59 ` Giuseppe Sacco
2020-07-08 8:38 ` Christophe Leroy
2020-07-08 8:56 ` Giuseppe Sacco
2020-07-08 17:00 ` Giuseppe Sacco
2020-07-08 17:09 ` Christophe Leroy
2020-07-08 17:36 ` Giuseppe Sacco
2020-07-08 18:44 ` Christophe Leroy
2020-08-21 6:55 ` Christophe Leroy
2020-08-21 8:22 ` Giuseppe Sacco
2020-08-21 13:29 ` Christophe Leroy
[not found] ` <8ce38d9bb162268f53a2292a916c44579421e552.camel@sguazz.it>
2020-08-21 14:03 ` Christophe Leroy
2020-08-21 15:44 ` Giuseppe Sacco
2020-08-22 8:28 ` Giuseppe Sacco
2020-08-24 5:17 ` Christophe Leroy
2020-08-24 20:48 ` Giuseppe Sacco
2020-08-26 10:10 ` Christophe Leroy [this message]
2020-08-26 13:53 ` Christophe Leroy
2020-08-26 22:28 ` Giuseppe Sacco
2020-08-27 7:46 ` Giuseppe Sacco
2020-08-27 8:28 ` Giuseppe Sacco
2020-08-27 10:39 ` Christophe Leroy
2020-08-27 14:37 ` Giuseppe Sacco
2020-08-27 18:28 ` Christophe Leroy
2020-08-28 17:07 ` Gabriel Paubert
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