[Qemu-devel] [PATCH 05/10] KVM don't care about TLB handling

[Juan Quintela]

From: Juan Quintela <address@hidden>

TLB handling is only used in TCG mode.  It is very costly for guests with lots
of memory ad lots of CPU's.

Signed-off-by: Juan Quintela <address@hidden>
Signed-off-by: Juan Quintela <address@hidden>
---
 exec.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/exec.c b/exec.c
index db9ff55..f5b2386 100644
--- a/exec.c
+++ b/exec.c
@@ -2028,6 +2028,9 @@ void cpu_physical_memory_reset_dirty(ram_addr_t start, 
ram_addr_t end,
         return;
     cpu_physical_memory_mask_dirty_range(start, length, dirty_flags);

+    if (kvm_enabled())
+        return;
+
     /* we modify the TLB cache so that the dirty bit will be set again
        when accessing the range */
     start1 = (unsigned long)qemu_get_ram_ptr(start);
-- 
1.7.3.2