^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Data gathering module for Linux-VM Monitor Stream, Stage 1.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Collects data related to memory management.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright IBM Corp. 2003, 2006
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kernel_stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/swap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "appldata.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define P2K(x) ((x) << (PAGE_SHIFT - 10)) /* Converts #Pages to KB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * Memory data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * This is accessed as binary data by z/VM. If changes to it can't be avoided,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * the structure version (product ID, see appldata_base.c) needs to be changed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * as well and all documentation and z/VM applications using it must be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * updated.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct appldata_mem_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) u64 timestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) u32 sync_count_1; /* after VM collected the record data, */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) same. If not, the record has been updated on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) the Linux side while VM was collecting the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) (possibly corrupt) data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u64 pgpgin; /* data read from disk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u64 pgpgout; /* data written to disk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) u64 pswpin; /* pages swapped in */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) u64 pswpout; /* pages swapped out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) u64 sharedram; /* sharedram is currently set to 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) u64 totalram; /* total main memory size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) u64 freeram; /* free main memory size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) u64 totalhigh; /* total high memory size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) u64 freehigh; /* free high memory size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u64 bufferram; /* memory reserved for buffers, free cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) u64 cached; /* size of (used) cache, w/o buffers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) u64 totalswap; /* total swap space size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) u64 freeswap; /* free swap space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) // New in 2.6 -->
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) u64 pgalloc; /* page allocations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) u64 pgfault; /* page faults (major+minor) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) u64 pgmajfault; /* page faults (major only) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) // <-- New in 2.6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * appldata_get_mem_data()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * gather memory data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static void appldata_get_mem_data(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * don't put large structures on the stack, we are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * serialized through the appldata_ops_mutex and can use static
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static struct sysinfo val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) unsigned long ev[NR_VM_EVENT_ITEMS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct appldata_mem_data *mem_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) mem_data = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) mem_data->sync_count_1++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) all_vm_events(ev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) mem_data->pgpgin = ev[PGPGIN] >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) mem_data->pgpgout = ev[PGPGOUT] >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) mem_data->pswpin = ev[PSWPIN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) mem_data->pswpout = ev[PSWPOUT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) mem_data->pgalloc = ev[PGALLOC_NORMAL];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) mem_data->pgalloc += ev[PGALLOC_DMA];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) mem_data->pgfault = ev[PGFAULT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) mem_data->pgmajfault = ev[PGMAJFAULT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) si_meminfo(&val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) mem_data->sharedram = val.sharedram;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) mem_data->totalram = P2K(val.totalram);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) mem_data->freeram = P2K(val.freeram);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) mem_data->totalhigh = P2K(val.totalhigh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) mem_data->freehigh = P2K(val.freehigh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) mem_data->bufferram = P2K(val.bufferram);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) mem_data->cached = P2K(global_node_page_state(NR_FILE_PAGES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) - val.bufferram);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) si_swapinfo(&val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) mem_data->totalswap = P2K(val.totalswap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) mem_data->freeswap = P2K(val.freeswap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) mem_data->timestamp = get_tod_clock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) mem_data->sync_count_2++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static struct appldata_ops ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .name = "mem",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) .record_nr = APPLDATA_RECORD_MEM_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .size = sizeof(struct appldata_mem_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) .callback = &appldata_get_mem_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .mod_lvl = {0xF0, 0xF0}, /* EBCDIC "00" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * appldata_mem_init()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * init_data, register ops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int __init appldata_mem_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ops.data = kzalloc(sizeof(struct appldata_mem_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (!ops.data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ret = appldata_register_ops(&ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) kfree(ops.data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * appldata_mem_exit()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * unregister ops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static void __exit appldata_mem_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) appldata_unregister_ops(&ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) kfree(ops.data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) module_init(appldata_mem_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) module_exit(appldata_mem_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) MODULE_AUTHOR("Gerald Schaefer");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) MODULE_DESCRIPTION("Linux-VM Monitor Stream, MEMORY statistics");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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