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[RFC,4/4] migration/postcopy-ram: ram_set_pages_wp fix

Message ID 20170309113437.9667-5-c.pinto@virtualopensystems.com
State New
Headers show

Commit Message

Christian Pinto March 9, 2017, 11:34 a.m. UTC 
setting UFFDIO_WRITEPROTECT_MODE_DONTWAKE when write un-protecting a page
does not wake up the faulting thread.
Set to 0 to force the faulting (VM) thread to wake-up.

Signed-off-by: Christian Pinto <c.pinto@virtualopensystems.com>
Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com>
---
 migration/postcopy-ram.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index 6252eb379a..684faae614 100644
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -384,7 +384,7 @@  int ram_set_pages_wp(ram_addr_t page_addr,
     wp_struct.range.start = (uint64_t)(uintptr_t)page_addr;
     wp_struct.range.len = size;
     if (remove) {
-        wp_struct.mode = UFFDIO_WRITEPROTECT_MODE_DONTWAKE;
+        wp_struct.mode = 0;
     } else {
         wp_struct.mode = UFFDIO_WRITEPROTECT_MODE_WP;
     }