Add support for --enable-assume-ram=SIZE.

1 files changed, 16 insertions, 0 deletions

diff --git a/INSTALL b/INSTALL
index f6bc4502..48ba0ff4 100644
--- a/INSTALL
+++ b/INSTALL
@@ -237,6 +237,22 @@ XZ Utils Installation
                 to optimize for size. You need to add -Os or equivalent
                 flag(s) to CFLAGS manually.
 
+    --enable-assume-ram=SIZE
+                On the most common operating systems, XZ Utils is able to
+                detect the amount of physical memory on the system. This
+                information is used to set the default memory usage limit.
+
+                On some systems, there is no code to detect the amount of
+                RAM though. Using --enable-assume-ram one can set how much
+                memory to assume on these systems. SIZE is given as MiB.
+                The default is 32 MiB, which is probably too low for most
+                systems, but it is enough to allow decompressing .xz files
+                created with the default settings.
+
+                Feel free to send patches to add support for detecting
+                the amount of RAM on the operating system you use. See
+                src/common/tuklib_physmem.c for details.
+
     --disable-threads
                 Disable threading support. This makes some things
                 thread-unsafe, meaning that if multithreaded application