/* * arch/s390/appldata/appldata_mem.c * * Data gathering module for Linux-VM Monitor Stream, Stage 1. * Collects data related to memory management. * * Copyright (C) 2003 IBM Corporation, IBM Deutschland Entwicklung GmbH. * * Author: Gerald Schaefer <geraldsc@de.ibm.com> */#include <linux/config.h>#include <linux/module.h>#include <linux/init.h>#include <linux/slab.h>#include <linux/errno.h>#include <linux/kernel_stat.h>#include <asm/io.h>#include <linux/pagemap.h>#include <linux/swap.h>#include "appldata.h"#define MY_PRINT_NAME "appldata_mem"		/* for debug messages, etc. */#define P2K(x) ((x) << (PAGE_SHIFT - 10))	/* Converts #Pages to KB *//* * Memory data * * This is accessed as binary data by z/VM. If changes to it can't be avoided, * the structure version (product ID, see appldata_base.c) needs to be changed * as well and all documentation and z/VM applications using it must be * updated. * * The record layout is documented in the Linux for zSeries Device Drivers * book: * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml */struct appldata_mem_data {	u64 timestamp;	u32 sync_count_1;       /* after VM collected the record data, */	u32 sync_count_2;	/* sync_count_1 and sync_count_2 should be the				   same. If not, the record has been updated on				   the Linux side while VM was collecting the				   (possibly corrupt) data */	u64 pgpgin;		/* data read from disk  */	u64 pgpgout;		/* data written to disk */	u64 pswpin;		/* pages swapped in  */	u64 pswpout;		/* pages swapped out */	u64 sharedram;		/* sharedram is currently set to 0 */	u64 totalram;		/* total main memory size */	u64 freeram;		/* free main memory size  */	u64 totalhigh;		/* total high memory size */	u64 freehigh;		/* free high memory size  */	u64 bufferram;		/* memory reserved for buffers, free cache */	u64 cached;		/* size of (used) cache, w/o buffers */	u64 totalswap;		/* total swap space size */	u64 freeswap;		/* free swap space */// New in 2.6 -->	u64 pgalloc;		/* page allocations */	u64 pgfault;		/* page faults (major+minor) */	u64 pgmajfault;		/* page faults (major only) */// <-- New in 2.6} appldata_mem_data;static inline void appldata_debug_print(struct appldata_mem_data *mem_data){	P_DEBUG("--- MEM - RECORD ---\n");	P_DEBUG("pgpgin     = %8lu KB\n", mem_data->pgpgin);	P_DEBUG("pgpgout    = %8lu KB\n", mem_data->pgpgout);	P_DEBUG("pswpin     = %8lu Pages\n", mem_data->pswpin);	P_DEBUG("pswpout    = %8lu Pages\n", mem_data->pswpout);	P_DEBUG("pgalloc    = %8lu \n", mem_data->pgalloc);	P_DEBUG("pgfault    = %8lu \n", mem_data->pgfault);	P_DEBUG("pgmajfault = %8lu \n", mem_data->pgmajfault);	P_DEBUG("sharedram  = %8lu KB\n", mem_data->sharedram);	P_DEBUG("totalram   = %8lu KB\n", mem_data->totalram);	P_DEBUG("freeram    = %8lu KB\n", mem_data->freeram);	P_DEBUG("totalhigh  = %8lu KB\n", mem_data->totalhigh);	P_DEBUG("freehigh   = %8lu KB\n", mem_data->freehigh);	P_DEBUG("bufferram  = %8lu KB\n", mem_data->bufferram);	P_DEBUG("cached     = %8lu KB\n", mem_data->cached);	P_DEBUG("totalswap  = %8lu KB\n", mem_data->totalswap);	P_DEBUG("freeswap   = %8lu KB\n", mem_data->freeswap);	P_DEBUG("sync_count_1 = %u\n", mem_data->sync_count_1);	P_DEBUG("sync_count_2 = %u\n", mem_data->sync_count_2);	P_DEBUG("timestamp    = %lX\n", mem_data->timestamp);}/* * appldata_get_mem_data() * * gather memory data */static void appldata_get_mem_data(void *data){	/*	 * don't put large structures on the stack, we are	 * serialized through the appldata_ops_lock and can use static	 */	static struct sysinfo val;	static struct page_state ps;	struct appldata_mem_data *mem_data;	mem_data = data;	mem_data->sync_count_1++;	get_full_page_state(&ps);	mem_data->pgpgin     = ps.pgpgin >> 1;	mem_data->pgpgout    = ps.pgpgout >> 1;	mem_data->pswpin     = ps.pswpin;	mem_data->pswpout    = ps.pswpout;	mem_data->pgalloc    = ps.pgalloc_high + ps.pgalloc_normal +			       ps.pgalloc_dma;	mem_data->pgfault    = ps.pgfault;	mem_data->pgmajfault = ps.pgmajfault;	si_meminfo(&val);	mem_data->sharedram = val.sharedram;	mem_data->totalram  = P2K(val.totalram);	mem_data->freeram   = P2K(val.freeram);	mem_data->totalhigh = P2K(val.totalhigh);	mem_data->freehigh  = P2K(val.freehigh);	mem_data->bufferram = P2K(val.bufferram);	mem_data->cached    = P2K(atomic_read(&nr_pagecache) - val.bufferram);	si_swapinfo(&val);	mem_data->totalswap = P2K(val.totalswap);	mem_data->freeswap  = P2K(val.freeswap);	mem_data->timestamp = get_clock();	mem_data->sync_count_2++;#ifdef APPLDATA_DEBUG	appldata_debug_print(mem_data);#endif}static struct appldata_ops ops = {	.ctl_nr    = CTL_APPLDATA_MEM,	.name      = "mem",	.record_nr = APPLDATA_RECORD_MEM_ID,	.size	   = sizeof(struct appldata_mem_data),	.callback  = &appldata_get_mem_data,	.data      = &appldata_mem_data,	.owner     = THIS_MODULE,};/* * appldata_mem_init() * * init_data, register ops */static int __init appldata_mem_init(void){	int rc;	P_DEBUG("sizeof(mem) = %lu\n", sizeof(struct appldata_mem_data));	rc = appldata_register_ops(&ops);	if (rc != 0) {		P_ERROR("Error registering ops, rc = %i\n", rc);	} else {		P_DEBUG("%s-ops registered!\n", ops.name);	}	return rc;}/* * appldata_mem_exit() * * unregister ops */static void __exit appldata_mem_exit(void){	appldata_unregister_ops(&ops);	P_DEBUG("%s-ops unregistered!\n", ops.name);}module_init(appldata_mem_init);module_exit(appldata_mem_exit);MODULE_LICENSE("GPL");MODULE_AUTHOR("Gerald Schaefer");MODULE_DESCRIPTION("Linux-VM Monitor Stream, MEMORY statistics");