[Xen-changelog] [IA64] Found the lost memory

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID 8ee4d4dac5520306da660a475b319ae9eb2f71d5
# Parent  0b0be946cf9c76dd0a6e6ececb056f73919a5513
[IA64] Found the lost memory

This patch can work around virtual memmap/discontig memory issues,
but memory gain may not be realized.

Signed-off-by: Anthony Xu <anthony.xu@xxxxxxxxx>

diff -r 0b0be946cf9c -r 8ee4d4dac552 xen/arch/ia64/xen/xensetup.c
--- a/xen/arch/ia64/xen/xensetup.c      Tue Feb 28 17:29:30 2006
+++ b/xen/arch/ia64/xen/xensetup.c      Tue Feb 28 19:02:50 2006
@@ -155,6 +155,24 @@
     .parity    = 'n',
     .stop_bits = 1
 };
+/*  This is a wrapper function of init_domheap_pages,
+ *  memory exceeds (max_page<<PAGE_SHIFT) will not be reclaimed.
+ *  This function will go away when the virtual memmap/discontig
+ *  memory issues are solved
+ */
+void init_domheap_pages_wrapper(unsigned long ps, unsigned long pe)
+{
+    unsigned long s_nrm, e_nrm, max_mem;
+    max_mem = (max_page+1)<<PAGE_SHIFT;
+    s_nrm = (ps+PAGE_SIZE-1)&PAGE_MASK;
+    e_nrm = pe&PAGE_MASK;
+    s_nrm = min(s_nrm, max_mem);
+    e_nrm = min(e_nrm, max_mem);
+    if(s_nrm < e_nrm)
+         init_domheap_pages(s_nrm, e_nrm);
+}
+
+
 
 void start_kernel(void)
 {
@@ -376,12 +394,14 @@
     dom0->vcpu[0]->cpu_affinity = cpumask_of_cpu(0);
 
     /* The stash space for the initial kernel image can now be freed up. */
-    init_domheap_pages(ia64_boot_param->domain_start,
-                       ia64_boot_param->domain_size);
+    /* init_domheap_pages_wrapper is temporary solution, please refer to the
+     * descriptor of this function */
+    init_domheap_pages_wrapper(ia64_boot_param->domain_start,
+           ia64_boot_param->domain_start+ia64_boot_param->domain_size);
     /* throw away initrd area passed from elilo */
     if (ia64_boot_param->initrd_size) {
-        init_domheap_pages(ia64_boot_param->initrd_start,
-                          ia64_boot_param->initrd_size);
+        init_domheap_pages_wrapper(ia64_boot_param->initrd_start,
+           ia64_boot_param->initrd_start+ia64_boot_param->initrd_size);
     }
 
     if (!running_on_sim)  // slow on ski and pages are pre-initialized to zero

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