Linux Kernel  3.7.1
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shmparam.h
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1 #ifndef _ASM_IA64_SHMPARAM_H
2 #define _ASM_IA64_SHMPARAM_H
3 
4 /*
5  * SHMLBA controls minimum alignment at which shared memory segments
6  * get attached. The IA-64 architecture says that there may be a
7  * performance degradation when there are virtual aliases within 1MB.
8  * To reduce the chance of this, we set SHMLBA to 1MB. --davidm 00/12/20
9  */
10 #define SHMLBA (1024*1024)
11 
12 #endif /* _ASM_IA64_SHMPARAM_H */