Merge remote-tracking branch 'savannah/master'

1 files changed, 22 insertions, 0 deletions

diff --git a/hurd/running/debian/faq/ram_limit.mdwn b/hurd/running/debian/faq/ram_limit.mdwn
new file mode 100644
index 00000000..447ff20c
--- /dev/null
+++ b/hurd/running/debian/faq/ram_limit.mdwn
@@ -0,0 +1,22 @@
+[[!meta copyright="Copyright © 2007, 2008, 2013 Free Software Foundation,
+Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+[[!meta title="830 MiB RAM Limit"]]
+
+Just like any 32bit OS without bad tricks, GNU Mach does 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.
+
+If you have an older version, or still experience problems with `vmstat` (see
+above) reported much less memory than you have, the best is to limit the memory
+it can see via GRUB's `upppermem` feature.  Add `uppermem 786432` to GRUB's Hurd
+entry in `menu.lst`.