Re: PPC64: G5 & 4k/64k page size

[Bertrand]

Oups. Edit :

swapon: /dev/sdb5 : pagesize doesn't fit with _swap_ space format

On 07/01/2020 16:27, Bertrand wrote:



swapon: /dev/sdb5 : pagesize doesn't fit with space space format

Re: PPC64: G5 & 4k/64k page size

[Bertrand]

On 07/01/2020 18:13, Romain Dolbeau wrote:

Le mar. 7 janv. 2020 à 16:27, Bertrand  a écrit :

I've tested the 5.5-rc package with the link you gave hereafter. When
you said "working kernel", did you mean it would not crash ? It doesn't
for me. I can boot successfully.



As your machine is booting regular 5.3 as well and seems not affected by
the bug, can you share some details about it? (exact model, number
of cores, ...).



It's this one : 
https://everymac.com/systems/apple/powermac_g5/specs/powermac_g5_2.0_dp_pci.html


powermac G5 PCI, two 2 Ghz cpu, radeon 9600, with 2GB of ram. I can send 
dmesg or something if you want.


Bertrand

Re: PPC64: G5 & 4k/64k page size

[Bertrand]

On 06/01/2020 19:30, Romain Dolbeau wrote:

Le dim. 5 janv. 2020 à 16:06, Bertrand Dekoninck
 a écrit :

I can now test on powermac 7,3 (with an ATI card)
How can I build a deb package of this kernel ? Or is there a package to 
download somewhere ?


I've tested the 5.5-rc package with the link you gave hereafter. When 
you said "working kernel", did you mean it would not crash ? It doesn't 
for me. I can boot successfully.



The only weirdness I could notice is that my swap space wasn't mounted. 
When I tried  to run swapon, I was given the following (roughly 
translated from french) :


swapon: /dev/sdb5 : pagesize doesn't fit with space space format

  unable to find swap-space signature

So I ran mkswap on the partition, I could then run swapon successfully.

But, when I boot the old kernel ( 5.3), I've got the same error again on 
swap and I have to format the swap space to mount it manually.


There's something wrong on swap page size between those two kernels.


I usually cross-compile on x86-64 from upstream sources. On a Debian
Buster with the powerpc tools installed,
it's just:

#
make ARCH=powerpc CROSS_COMPILE=powerpc64-linux-gnu- oldconfig && nice
-19 make ARCH=powerpc CROSS_COMPILE=powerpc64-linux-gnu- -j56
bindeb-pkg


(alter the -j56 for your own build system). For the dependency, as far
as I remember I only needed "gcc-powerpc64-linux-gnu" and
dependencies. My '.config' is Debian's 5.3 plus default values for
changes - with the exception of 4 KiB pages.I should use the same and the same 
config file also.
I'll try this later. Should I download the 5.5-rc1 kernel source or 
something else ?


I've also uploaded the working kernel with 4 KiB pages DEB here:
<http://dl.free.fr/otB1KMEMR>, as it might be easier for a quick test.

Cordially,


Cheers,

Bertrand

Re: PPC64: G5 & 4k/64k page size (was: Re: Call for report - G5/PPC970 status)

[Bertrand Dekoninck]

> Le 14 déc. 2019 à 10:32, Jeroen Diederen  a écrit :
> 
> on my iMac iSight:
> 
> 
> grep CONFIG_PPC.*PAGE config-5.3.0-3-powerpc64 
> # CONFIG_PPC_4K_PAGES is not set
> CONFIG_PPC_64K_PAGES=y
> CONFIG_PPC_PAGE_SHIFT=16
> # CONFIG_PPC_SUBPAGE_PROT is not set
> 
> I can't give you info about the G5 PowerMac 7,3 as it is not my machine.

I can now test on powermac 7,3 (with an ATI card)
How can I build a deb package of this kernel ? Or is there a package to 
download somewhere ?
Bertrand