File 0037-Raise-soft-address-space-limit-to-h.patch of Package qemu

From 09d66eb5f5ce1a3dd2b681459fac969d286fb4e4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20F=C3=A4rber?= <afaerber@suse.de>
Date: Sun, 15 Jan 2012 19:53:49 +0100
Subject: [PATCH] Raise soft address space limit to hard limit
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For SLES we want users to be able to use large memory configurations
with KVM without fiddling with ulimit -Sv.

Signed-off-by: Andreas Färber <afaerber@suse.de>
[BR: add include for sys/resource.h]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 vl.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/vl.c b/vl.c
index 51de200..7e0e851 100644
--- a/vl.c
+++ b/vl.c
@@ -27,6 +27,7 @@
 #include <time.h>
 #include <errno.h>
 #include <sys/time.h>
+#include <sys/resource.h>
 
 #include "config-host.h"
 
@@ -2768,6 +2769,7 @@ int main(int argc, char **argv, char **envp)
     uint64_t ram_slots = 0;
     FILE *vmstate_dump_file = NULL;
     Error *main_loop_err = NULL;
+    struct rlimit rlimit_as;
 
     qemu_init_cpu_loop();
     qemu_mutex_lock_iothread();
@@ -2776,6 +2778,16 @@ int main(int argc, char **argv, char **envp)
     error_set_progname(argv[0]);
     qemu_init_exec_dir(argv[0]);
 
+    /*
+     * Try to raise the soft address space limit.
+     * Default on SLES 11 SP2 is 80% of physical+swap memory.
+     */
+    getrlimit(RLIMIT_AS, &rlimit_as);
+    if (rlimit_as.rlim_cur < rlimit_as.rlim_max) {
+        rlimit_as.rlim_cur = rlimit_as.rlim_max;
+        setrlimit(RLIMIT_AS, &rlimit_as);
+    }
+
     g_mem_set_vtable(&mem_trace);
 
     module_call_init(MODULE_INIT_QOM);