November 23, 2025 at 3:47 PM, "Samuel Thibault" <[email protected] 
mailto:[email protected]?to=%22Samuel%20Thibault%22%20%3Csamuel.thibault%40gnu.org%3E
 > wrote:



> 
> [email protected], mailto:[email protected],  le dim. 23 nov. 2025 
> 21:43:38 +0100, a ecrit:
> 
> > 
> > Nov 23, 2025, 19:24 by [email protected]:
> >  
> >  Samuel Thibault, le mer. 19 nov. 2025 16:23:02 +0100, a ecrit:
> > 
> >  yelninei--- via Bug reports for the GNU Hurd, le mer. 19 nov. 2025 
> > 15:11:28 +0100, a ecrit:
> >  > Trying to run a x86_64 hurd image with qemu and it fails to boot when 
> > the -m option is too high. Something gets stuck after grub, the last 
> > message is
> >  > ext2fs: part:1:device:wd0: Input/output error
> >  > 
> >  > After reducing the ram to < 3584 the issue goes away.
> >  > 
> >  > This happens both with images cross compiled with guix and the 
> > debian-hurd-amd64-20250807.img.
> >  > 
> >  > Is this limitation currently known?
> > 
> >  No, we have some buildds with 16GB ram.
> > 
> >  Perhaps try with -M q35: perhaps there are issues with some virtual
> >  devices when using 64b physical addresses.
> > 
> >  
> >  HI Samuel,
> >  Thanks a lot, that seems to solve it
> > 
> As a reminder, readme files are meant to be read, they notably say to
> use -M q35.
> 
> Samuel


Should I go ahead and start moving the wiki pages to encourage people to use
the 64 bit hurd by default ?  These links mention the 32 bit hurd:

https://hurdos.com/wiki/hurd/running/qemu.html#index1h1
https://hurdos.com/wiki/hurd/running/debian.html

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