Am 15.09.2010 um 19:08 schrieb Andrea Arcangeli:
From: Andrea Arcangeli <aarca...@redhat.com>
All allocated guest physical memory shall be marked MADV_DONTFORK,
otherwise
fork will fail because of accounting issues preventing migration or
netdev_add
when the guest allocated more than half of host physical memory.
Signed-off-by: Andrea Arcangeli <aarca...@redhat.com>
---
diff --git a/exec.c b/exec.c
index 380dab5..e2bdf19 100644
--- a/exec.c
+++ b/exec.c
@@ -2861,6 +2861,9 @@ ram_addr_t qemu_ram_alloc_from_ptr(DeviceState
*dev, const char *name,
#ifdef MADV_MERGEABLE
madvise(new_block->host, size, MADV_MERGEABLE);
#endif
+#ifdef MADV_DONTFORK
+ madvise(new_block->host, size, MADV_DONTFORK);
+#endif
There is a pending patch which introduces qemu_madvise() and will
eliminate the need for these #ifdefs, which was demanded by Blue. I'll
cc you on v6.
Regards,
Andreas
