[RFC,v1,1/4] migration: Remove static allocation of xzblre cache buffer
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Message ID 1465808915-4887-2-git-send-email-vijayak@caviumnetworks.com
State New
Headers show

Commit Message

vijayak@caviumnetworks.com June 13, 2016, 9:08 a.m. UTC
From: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>

Allocate xzblre zero page cache buffer dynamically.
Remove dependency on TARGET_PAGE_SIZE to make run-time
page size detection for arm platforms.

Signed-off-by: Vijaya Kumar K <vijayak@cavium.com>
---
 migration/ram.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Patch
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diff --git a/migration/ram.c b/migration/ram.c
index 844ea46..ba3b352 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -69,7 +69,7 @@  static uint64_t bitmap_sync_count;
 /* 0x80 is reserved in migration.h start with 0x100 next */
 #define RAM_SAVE_FLAG_COMPRESS_PAGE    0x100
 
-static const uint8_t ZERO_TARGET_PAGE[TARGET_PAGE_SIZE];
+static uint8_t *ZERO_TARGET_PAGE;
 
 static inline bool is_zero_range(uint8_t *p, uint64_t size)
 {
@@ -1437,6 +1437,7 @@  static void ram_migration_cleanup(void *opaque)
         cache_fini(XBZRLE.cache);
         g_free(XBZRLE.encoded_buf);
         g_free(XBZRLE.current_buf);
+        g_free(ZERO_TARGET_PAGE);
         XBZRLE.cache = NULL;
         XBZRLE.encoded_buf = NULL;
         XBZRLE.current_buf = NULL;
@@ -1893,6 +1894,7 @@  static int ram_save_setup(QEMUFile *f, void *opaque)
 
     if (migrate_use_xbzrle()) {
         XBZRLE_cache_lock();
+        ZERO_TARGET_PAGE = g_malloc0(TARGET_PAGE_SIZE);
         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
                                   TARGET_PAGE_SIZE,
                                   TARGET_PAGE_SIZE);