[Qemu-devel] [Bug 1273944] Re: multiboot header has 0 in mem_upper field

[Peter Chubb]

This change fixes it.

diff --git a/exec.c b/exec.c
index 2435d9e..b387d28 100644
--- a/exec.c
+++ b/exec.c
@@ -1070,7 +1070,7 @@ static void *file_ram_alloc(RAMBlock *block,
         }
 
         /* MAP_POPULATE silently ignores failures */
-        for (i = 0; i < (memory/hpagesize); i++) {
+        for (i = 0; i < (memory/hpagesize)-1; i++) {
             memset(area + (hpagesize*i), 0, 1);
         }
 
address@hidden:/usr/src/qemu/tests/m

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https://bugs.launchpad.net/bugs/1273944

Title:
  multiboot header has 0 in mem_upper field

Status in QEMU:
  New

Bug description:
  When booting a multiboot image,. mem_upper is now always zero.

  To test, build qemu from current git head, then do
    cd tests/multiboot
    ./run_test.sh

  You will see the test fail.  In each case mem_upper is 0k.

  git-bisect says the bad commit is
  0169c511554cb0014a00290b0d3d26c31a49818f in qemu.git

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