ia64/linux-2.6.18-xen.hg

view drivers/oprofile/event_buffer.h @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 132f24200f4c
children
line source
1 /**
2 * @file event_buffer.h
3 *
4 * @remark Copyright 2002 OProfile authors
5 * @remark Read the file COPYING
6 *
7 * @author John Levon <levon@movementarian.org>
8 */
10 #ifndef EVENT_BUFFER_H
11 #define EVENT_BUFFER_H
13 #include <linux/types.h>
14 #include <asm/mutex.h>
16 int alloc_event_buffer(void);
18 void free_event_buffer(void);
20 /* wake up the process sleeping on the event file */
21 void wake_up_buffer_waiter(void);
23 /* Each escaped entry is prefixed by ESCAPE_CODE
24 * then one of the following codes, then the
25 * relevant data.
26 */
27 #define ESCAPE_CODE ~0UL
28 #define CTX_SWITCH_CODE 1
29 #define CPU_SWITCH_CODE 2
30 #define COOKIE_SWITCH_CODE 3
31 #define KERNEL_ENTER_SWITCH_CODE 4
32 #define USER_ENTER_SWITCH_CODE 5
33 #define MODULE_LOADED_CODE 6
34 #define CTX_TGID_CODE 7
35 #define TRACE_BEGIN_CODE 8
36 #define TRACE_END_CODE 9
37 #define XEN_ENTER_SWITCH_CODE 10
38 #define DOMAIN_SWITCH_CODE 11
40 #define INVALID_COOKIE ~0UL
41 #define NO_COOKIE 0UL
43 /* Constant used to refer to coordinator domain (Xen) */
44 #define COORDINATOR_DOMAIN -1
46 /* add data to the event buffer */
47 void add_event_entry(unsigned long data);
49 extern struct file_operations event_buffer_fops;
51 /* mutex between sync_cpu_buffers() and the
52 * file reading code.
53 */
54 extern struct mutex buffer_mutex;
56 #endif /* EVENT_BUFFER_H */