On Tue, Feb 27, 2024, at 16:44, Christophe Leroy wrote:

Le 27/02/2024 à 16:40, Arnd Bergmann a écrit :

quoted

On Mon, Feb 26, 2024, at 17:55, Samuel Holland wrote:

For 256K pages, powerpc has the following help. I think you should have 
it too:

	  The kernel will only be able to run applications that have been
	  compiled with '-zmax-page-size' set to 256K (the default is 64K) using
	  binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
	  definition from 0x10000 to 0x40000 in older versions.

I don't think we need to mention pre-2.18 binutils any more, but the
rest seems useful, changed the text now to

config PAGE_SIZE_256KB
        bool "256KiB pages"
        depends on HAVE_PAGE_SIZE_256KB
        help
          256KiB pages have little practical value due to their extreme
          memory usage.  The kernel will only be able to run applications
          that have been compiled with '-zmax-page-size' set to 256KiB
          (the default is 64KiB or 4KiB on most architectures).

      Arnd