1. 根目录:
2. arch
3. ia64
4. include
5. asm
6. shmparam.h

#ifndef _ASM_IA64_SHMPARAM_H
#define _ASM_IA64_SHMPARAM_H

/*
 * SHMLBA controls minimum alignment at which shared memory segments
 * get attached.  The IA-64 architecture says that there may be a
 * performance degradation when there are virtual aliases within 1MB.
 * To reduce the chance of this, we set SHMLBA to 1MB. --davidm 00/12/20
 */
#define	SHMLBA	(1024*1024)

#endif /* _ASM_IA64_SHMPARAM_H */