static int show_pagefault(struct seq_file *m, void *v) // It is used to print total pagefaults on the console
{
all_vm_events(stats_buffer);
seq_printf(m, "******Kernel Module Assignment****** \nNumber of pagefaults :\t");
seq_printf(m, "%lu\n", stats_buffer[PGFAULT]);
return 0;
}
static unsigned int update_balloon_stats(struct virtio_balloon *vb)
{
unsigned long events[NR_VM_EVENT_ITEMS];
struct sysinfo i;
unsigned int idx = 0;
long available;
all_vm_events(events);
si_meminfo(&i);
available = si_mem_available();
#ifdef CONFIG_VM_EVENT_COUNTERS
update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_IN,
pages_to_bytes(events[PSWPIN]));
update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_OUT,
pages_to_bytes(events[PSWPOUT]));
update_stat(vb, idx++, VIRTIO_BALLOON_S_MAJFLT, events[PGMAJFAULT]);
update_stat(vb, idx++, VIRTIO_BALLOON_S_MINFLT, events[PGFAULT]);
#endif
update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMFREE,
pages_to_bytes(i.freeram));
update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMTOT,
pages_to_bytes(i.totalram));
update_stat(vb, idx++, VIRTIO_BALLOON_S_AVAIL,
pages_to_bytes(available));
return idx;
}
/*
* 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;
unsigned long ev[NR_VM_EVENT_ITEMS];
struct appldata_mem_data *mem_data;
mem_data = data;
mem_data->sync_count_1++;
all_vm_events(ev);
mem_data->pgpgin = ev[PGPGIN] >> 1;
mem_data->pgpgout = ev[PGPGOUT] >> 1;
mem_data->pswpin = ev[PSWPIN];
mem_data->pswpout = ev[PSWPOUT];
mem_data->pgalloc = ev[PGALLOC_NORMAL];
#ifdef CONFIG_ZONE_DMA
mem_data->pgalloc += ev[PGALLOC_DMA];
#endif
mem_data->pgfault = ev[PGFAULT];
mem_data->pgmajfault = ev[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(global_page_state(NR_FILE_PAGES)
- 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 void update_balloon_stats(struct virtio_balloon *vb)
{
unsigned long events[NR_VM_EVENT_ITEMS];
struct sysinfo i;
int idx = 0;
all_vm_events(events);
si_meminfo(&i);
update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_IN,
pages_to_bytes(events[PSWPIN]));
update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_OUT,
pages_to_bytes(events[PSWPOUT]));
update_stat(vb, idx++, VIRTIO_BALLOON_S_MAJFLT, events[PGMAJFAULT]);
update_stat(vb, idx++, VIRTIO_BALLOON_S_MINFLT, events[PGFAULT]);
update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMFREE,
pages_to_bytes(i.freeram));
update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMTOT,
pages_to_bytes(i.totalram));
}
static unsigned int update_balloon_stats(struct virtio_balloon *vb)
{
unsigned long events[NR_VM_EVENT_ITEMS];
struct sysinfo i;
unsigned int idx = 0;
long available;
unsigned long caches;
all_vm_events(events);
si_meminfo(&i);
available = si_mem_available();
caches = global_node_page_state(NR_FILE_PAGES);
#ifdef CONFIG_VM_EVENT_COUNTERS
update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_IN,
pages_to_bytes(events[PSWPIN]));
update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_OUT,
pages_to_bytes(events[PSWPOUT]));
update_stat(vb, idx++, VIRTIO_BALLOON_S_MAJFLT, events[PGMAJFAULT]);
update_stat(vb, idx++, VIRTIO_BALLOON_S_MINFLT, events[PGFAULT]);
#ifdef CONFIG_HUGETLB_PAGE
update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGALLOC,
events[HTLB_BUDDY_PGALLOC]);
update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGFAIL,
events[HTLB_BUDDY_PGALLOC_FAIL]);
#endif
#endif
update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMFREE,
pages_to_bytes(i.freeram));
update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMTOT,
pages_to_bytes(i.totalram));
update_stat(vb, idx++, VIRTIO_BALLOON_S_AVAIL,
pages_to_bytes(available));
update_stat(vb, idx++, VIRTIO_BALLOON_S_CACHES,
pages_to_bytes(caches));
return idx;
}