minix/servers/vm/glo.h
Ben Gras f78d8e74fd secondary cache feature in vm.
A new call to vm lets processes yield a part of their memory to vm,
together with an id, getting newly allocated memory in return. vm is
allowed to forget about it if it runs out of memory. processes can ask
for it back using the same id. (These two operations are normally
combined in a single call.)

It can be used as a as-big-as-memory-will-allow block cache for
filesystems, which is how mfs now uses it.
2010-05-05 11:35:04 +00:00

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551 B
C

#include <minix/sys_config.h>
#include <sys/stat.h>
#include <a.out.h>
#include <tools.h>
#include "vm.h"
#include "vmproc.h"
#if _MAIN
#undef EXTERN
#define EXTERN
#endif
#define VMP_SYSTEM _NR_PROCS
#define VMP_EXECTMP _NR_PROCS+1
#define VMP_NR _NR_PROCS+2
EXTERN struct vmproc vmproc[VMP_NR];
#if SANITYCHECKS
EXTERN int nocheck;
EXTERN int incheck;
EXTERN long vm_sanitychecklevel;
#endif
/* total number of memory pages */
EXTERN int total_pages;
/* vm operation mode state and values */
EXTERN long vm_paged;
EXTERN int meminit_done;