Forward port of HugeTLB, InnoDB doublewrite and checksums patches to 5.0

BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted

3 files changed, 31 insertions, 0 deletions

diff --git a/innobase/include/buf0buf.h b/innobase/include/buf0buf.h
index 8df1211327f..5ee323f1b1e 100644
--- a/innobase/include/buf0buf.h
+++ b/innobase/include/buf0buf.h
@@ -52,6 +52,8 @@ Created 11/5/1995 Heikki Tuuri
 /* Modes for buf_page_get_known_nowait */
 #define BUF_MAKE_YOUNG	51
 #define BUF_KEEP_OLD	52
+/* Magic value to use instead of checksums when they are disabled */
+#define BUF_NO_CHECKSUM_MAGIC 0xDEADBEEFUL
 
 extern buf_pool_t* 	buf_pool; 	/* The buffer pool of the database */
 extern ibool		buf_debug_prints;/* If this is set TRUE, the program
diff --git a/innobase/include/os0proc.h b/innobase/include/os0proc.h
index d0d3cf82e38..b0b72e18675 100644
--- a/innobase/include/os0proc.h
+++ b/innobase/include/os0proc.h
@@ -12,6 +12,11 @@ Created 9/30/1995 Heikki Tuuri
 
 #include "univ.i"
 
+#ifdef UNIV_LINUX
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#endif
+
 typedef void*			os_process_t;
 typedef unsigned long int	os_process_id_t;
 
@@ -27,6 +32,10 @@ page size of an Intel x86 processor. We cannot use AWE with 2 MB or 4 MB
 pages. */
 #define	OS_AWE_X86_PAGE_SIZE	4096
 
+extern ibool os_use_large_pages;
+/* Large page size. This may be a boot-time option on some platforms */
+extern ulint os_large_page_size;
+
 /********************************************************************
 Windows AWE support. Tries to enable the "lock pages in memory" privilege for
 the current process so that the current process can allocate memory-locked
@@ -103,6 +112,25 @@ os_mem_alloc_nocache(
 			/* out: allocated memory */
 	ulint	n);	/* in: number of bytes */
 /********************************************************************
+Allocates large pages memory. */
+
+void*
+os_mem_alloc_large(
+/*=================*/
+      /* out: allocated memory */
+	ulint   n,     /* in: number of bytes */
+  ibool   set_to_zero, /* in: TRUE if allocated memory should be set
+          to zero if UNIV_SET_MEM_TO_ZERO is defined */
+  ibool	  assert_on_error); /* in: if TRUE, we crash mysqld if the memory
+          cannot be allocated */
+/********************************************************************
+Frees large pages memory. */
+
+void
+os_mem_free_large(
+/*=================*/
+void    *ptr);  /* in: number of bytes */
+/********************************************************************
 Sets the priority boost for threads released from waiting within the current
 process. */
 
diff --git a/innobase/include/srv0srv.h b/innobase/include/srv0srv.h
index d4cc7d8222f..84b7d14ca00 100644
--- a/innobase/include/srv0srv.h
+++ b/innobase/include/srv0srv.h
@@ -107,6 +107,7 @@ extern ibool	srv_very_fast_shutdown;  /* if this TRUE, do not flush the
 extern ibool	srv_innodb_status;
 
 extern ibool	srv_use_doublewrite_buf;
+extern ibool	srv_use_checksums;
 
 extern ibool    srv_set_thread_priorities;
 extern int      srv_query_thread_priority;