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[PULL,10/57] Add QEMU_MADV_NOHUGEPAGE

Message ID 1447165546-27784-11-git-send-email-quintela@redhat.com
State New
Headers show

Commit Message

Juan Quintela Nov. 10, 2015, 2:24 p.m. UTC 
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Add QEMU_MADV_NOHUGEPAGE as an OS-independent version of
MADV_NOHUGEPAGE.

We include sys/mman.h before making the test to ensure
that we pick up the system defines.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---
 include/qemu/osdep.h | 9 +++++++++
 1 file changed, 9 insertions(+)
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Patch

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index ab2d5d9..861d84b 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -139,6 +139,8 @@  void qemu_anon_ram_free(void *ptr, size_t size);

 #if defined(CONFIG_MADVISE)

+#include <sys/mman.h>
+
 #define QEMU_MADV_WILLNEED  MADV_WILLNEED
 #define QEMU_MADV_DONTNEED  MADV_DONTNEED
 #ifdef MADV_DONTFORK
@@ -171,6 +173,11 @@  void qemu_anon_ram_free(void *ptr, size_t size);
 #else
 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
 #endif
+#ifdef MADV_NOHUGEPAGE
+#define QEMU_MADV_NOHUGEPAGE MADV_NOHUGEPAGE
+#else
+#define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID
+#endif

 #elif defined(CONFIG_POSIX_MADVISE)

@@ -182,6 +189,7 @@  void qemu_anon_ram_free(void *ptr, size_t size);
 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID
 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 #define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
+#define QEMU_MADV_NOHUGEPAGE  QEMU_MADV_INVALID

 #else /* no-op */

@@ -193,6 +201,7 @@  void qemu_anon_ram_free(void *ptr, size_t size);
 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID
 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 #define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
+#define QEMU_MADV_NOHUGEPAGE  QEMU_MADV_INVALID

 #endif