Hello, Joshua Branson, le mer. 07 nov. 2018 12:00:48 -0500, a ecrit: > -Just like any 32-bit OS without bad tricks, GNU Mach can not cope well with > lots > -of memory. Latest versions of the Debian `gnumach` package will limit > themselves > -to around 1.7 GiB of memory. If you want more, you can twiddle the > `VM_MAX_ADDRESS` > -limit between kernelland and userland in `i386/include/mach/i386/vm_param.h`. > +The 830MB RAM limit has been removed, but just like any 32-bit OS without > bad tricks, > +GNU Mach can not cope well with lots of memory. Latest versions of the > Debian `gnumach` > +package will limit themselves to 3 GiB of memory. If you want more, you can > twiddle > +the `VM_MAX_ADDRESS` limit between kernelland and userland in > +`i386/include/mach/i386/vm_param.h`, but glibc and the hurd servers will not > cope > +well with less than 1 GB.
Mmm, this is outdated. Richard implemented the highmem mapping support needed to manage more than 2-3GiB of memory, so we don't have that limitation any more. It's however still useful to mention that managing a lot of memory with 32bit systems is a bit costly and the 64bit port would help on this. Samuel
