Hello,

[email protected], le lun. 24 nov. 2025 14:08:18 +0000, a ecrit:
> 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.
> 
> Should I go ahead and start moving the wiki pages to encourage people to use
> the 64 bit hurd by default ?

64b is still for now a bit less stable with rump drivers than 32b (as
the very example shown above shows), so if we recommend something that'd
rather be 32b.

Samuel

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