[lfs-support] compile 4.17.7 32 bit

Ken Moffat zarniwhoop at ntlworld.com
Tue Jul 17 20:39:57 PDT 2018


On Wed, Jul 18, 2018 at 04:31:47AM +0100, Ken Moffat wrote:
> > I used a Core2Duo for about 6 years.  It is a native x86_64 system, but can
> > run 32-bit kernels and thus 32-bit systems.
> > 
> No idea what the bug on x86_64 is, I'm behind on reading lkml, but I
> think it is likely that 'i386' might mean 'on x86 machines running
> as 32-bit'.
> 
> And apparently there is a one patch revision for 4.17.8 due on
> Thursday, no idea if it might help or not:
> 
> https://lkml.org/lkml/2018/7/17/443
> 
>  and
> 
> https://lkml.org/lkml/2018/7/17/505
> 
It *does* affect all 32-bit x86 :

https://lkml.org/lkml/2018/7/16/809

> Qemu test results:
> 	total: 171 pass: 159 fail: 12
> Failed tests: 
> 	i386:Broadwell:q35:defconfig:smp:rootfs 
> 	i386:Skylake-Client:q35:defconfig:smp:rootfs 
> 	i386:SandyBridge:q35:defconfig:smp:rootfs
> 	i386:Haswell:pc:defconfig:smp:rootfs 
> 	i386:Nehalem:q35:defconfig:smp:rootfs 
> 	i386:phenom:pc:defconfig:smp:rootfs 
> 	i386:Opteron_G5:q35:defconfig:smp:initrd 
> 	i386:Westmere:q35:defconfig:smp:initrd 
> 	i386:core2duo:q35:defconfig:nosmp:rootfs 
> 	i386:Conroe:pc:defconfig:nosmp:rootfs 
> 	i386:Opteron_G1:pc:defconfig:nosmp:initrd
> 	i386:n270:q35:defconfig:nosmp:rootfs
> 
> All 32-bit i386 boot tests crash.

And the reply was that the known fix is not yet in Linus's tree, so
it can't be applied to stable until Linus commits it.

So the one patch in 4.17.8-rc won't help 32-bit.

ĸen
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