[OE-core] [PATCH 1/2] runqemu: default qemumips memory to 256M

[Robert Yang]

The qemumips or qemumips64 can't be boot with 512M.

*Fixed when no QB_MEM is set:
 - runqemu qemumips nographic core-image-minimal
[    0.000000] Call Trace:
[    0.000000] [<8011c010>] clear_page+0x0/0x128
[    0.000000] [<8022b818>] get_page_from_freelist+0xa1c/0xb48
[    0.000000] [<8022c00c>] __alloc_pages_nodemask+0xd8/0xf0c
[    0.000000] [<8022ce58>] __get_free_pages+0x18/0x60
[    0.000000] [<80118674>] setup_zero_pages+0x1c/0x98
[    0.000000] [<80bd23e4>] mem_init+0x44/0x54
[    0.000000] [<80bca964>] start_kernel+0x20c/0x4bc
[    0.000000] [<80920090>] kernel_entry+0x0/0x40
[    0.000000] Code: 00000000  00000000  00000000 <34860f80> cc9e0000  cc9e0010  cc9e0020  cc9e0030  cc9e0040
[    0.000000]
[    0.000000] ---[ end trace 0000000000000000 ]---
[    0.000000] Kernel panic - not syncing: Attempted to kill the idle task!
[    0.000000] ---[ end Kernel panic - not syncing: Attempted to kill the idle task!

[YOCTO #11521]

Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
---
 scripts/runqemu | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/scripts/runqemu b/scripts/runqemu
index df76270..ce8cccc 100755
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -639,8 +639,13 @@ class BaseConfig(object):
         if s:
             self.set('QB_MEM', '-m %s' % s.group(1))
         elif not self.get('QB_MEM'):
-            logger.info('QB_MEM is not set, use 512M by default')
-            self.set('QB_MEM', '-m 512')
+            mach = self.get('MACHINE')
+            if mach.startswith('qemumips'):
+                logger.info('QB_MEM is not set, use 256M by default')
+                self.set('QB_MEM', '-m 256')
+            else:
+                logger.info('QB_MEM is not set, use 512M by default')
+                self.set('QB_MEM', '-m 512')
 
         self.kernel_cmdline_script += ' mem=%s' % self.get('QB_MEM').replace('-m','').strip() + 'M'
         self.qemu_opt_script += ' %s' % self.get('QB_MEM')
-- 
2.10.2