diff mbox

[V6,6/6] coroutine: reduce stack size to 64kB

Message ID 1471871071-17819-7-git-send-email-pl@kamp.de (mailing list archive)
State New, archived
Headers show

Commit Message

Peter Lieven Aug. 22, 2016, 1:04 p.m. UTC 
evaluation with the recently introduced maximum stack usage monitoring revealed
that the actual used stack size was never above 4kB so allocating 1MB stack
for each coroutine is a lot of wasted memory. So reduce the stack size to
64kB which should still give enough head room. The guard page added
in qemu_alloc_stack will catch a potential stack overflow introduced
by this commit.

Signed-off-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
 include/qemu/coroutine_int.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/include/qemu/coroutine_int.h b/include/qemu/coroutine_int.h
index f62f83f..011910f 100644
--- a/include/qemu/coroutine_int.h
+++ b/include/qemu/coroutine_int.h
@@ -28,7 +28,7 @@ 
 #include "qemu/queue.h"
 #include "qemu/coroutine.h"
 
-#define COROUTINE_STACK_SIZE (1 << 20)
+#define COROUTINE_STACK_SIZE (1 << 16)
 
 typedef enum {
     COROUTINE_YIELD = 1,