proc: switch /proc/meminfo to seq_file
and move it to fs/proc/meminfo.c while I'm at it.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
new file mode 100644
index 0000000..b1675c4
--- /dev/null
+++ b/fs/proc/meminfo.c
@@ -0,0 +1,168 @@
+#include <linux/fs.h>
+#include <linux/hugetlb.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/mmzone.h>
+#include <linux/proc_fs.h>
+#include <linux/quicklist.h>
+#include <linux/seq_file.h>
+#include <linux/swap.h>
+#include <linux/vmstat.h>
+#include <asm/atomic.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include "internal.h"
+
+void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
+{
+}
+
+static int meminfo_proc_show(struct seq_file *m, void *v)
+{
+ struct sysinfo i;
+ unsigned long committed;
+ unsigned long allowed;
+ struct vmalloc_info vmi;
+ long cached;
+ unsigned long pages[NR_LRU_LISTS];
+ int lru;
+
+/*
+ * display in kilobytes.
+ */
+#define K(x) ((x) << (PAGE_SHIFT - 10))
+ si_meminfo(&i);
+ si_swapinfo(&i);
+ committed = atomic_long_read(&vm_committed_space);
+ allowed = ((totalram_pages - hugetlb_total_pages())
+ * sysctl_overcommit_ratio / 100) + total_swap_pages;
+
+ cached = global_page_state(NR_FILE_PAGES) -
+ total_swapcache_pages - i.bufferram;
+ if (cached < 0)
+ cached = 0;
+
+ get_vmalloc_info(&vmi);
+
+ for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
+ pages[lru] = global_page_state(NR_LRU_BASE + lru);
+
+ /*
+ * Tagged format, for easy grepping and expansion.
+ */
+ seq_printf(m,
+ "MemTotal: %8lu kB\n"
+ "MemFree: %8lu kB\n"
+ "Buffers: %8lu kB\n"
+ "Cached: %8lu kB\n"
+ "SwapCached: %8lu kB\n"
+ "Active: %8lu kB\n"
+ "Inactive: %8lu kB\n"
+ "Active(anon): %8lu kB\n"
+ "Inactive(anon): %8lu kB\n"
+ "Active(file): %8lu kB\n"
+ "Inactive(file): %8lu kB\n"
+#ifdef CONFIG_UNEVICTABLE_LRU
+ "Unevictable: %8lu kB\n"
+ "Mlocked: %8lu kB\n"
+#endif
+#ifdef CONFIG_HIGHMEM
+ "HighTotal: %8lu kB\n"
+ "HighFree: %8lu kB\n"
+ "LowTotal: %8lu kB\n"
+ "LowFree: %8lu kB\n"
+#endif
+ "SwapTotal: %8lu kB\n"
+ "SwapFree: %8lu kB\n"
+ "Dirty: %8lu kB\n"
+ "Writeback: %8lu kB\n"
+ "AnonPages: %8lu kB\n"
+ "Mapped: %8lu kB\n"
+ "Slab: %8lu kB\n"
+ "SReclaimable: %8lu kB\n"
+ "SUnreclaim: %8lu kB\n"
+ "PageTables: %8lu kB\n"
+#ifdef CONFIG_QUICKLIST
+ "Quicklists: %8lu kB\n"
+#endif
+ "NFS_Unstable: %8lu kB\n"
+ "Bounce: %8lu kB\n"
+ "WritebackTmp: %8lu kB\n"
+ "CommitLimit: %8lu kB\n"
+ "Committed_AS: %8lu kB\n"
+ "VmallocTotal: %8lu kB\n"
+ "VmallocUsed: %8lu kB\n"
+ "VmallocChunk: %8lu kB\n",
+ K(i.totalram),
+ K(i.freeram),
+ K(i.bufferram),
+ K(cached),
+ K(total_swapcache_pages),
+ K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]),
+ K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
+ K(pages[LRU_ACTIVE_ANON]),
+ K(pages[LRU_INACTIVE_ANON]),
+ K(pages[LRU_ACTIVE_FILE]),
+ K(pages[LRU_INACTIVE_FILE]),
+#ifdef CONFIG_UNEVICTABLE_LRU
+ K(pages[LRU_UNEVICTABLE]),
+ K(global_page_state(NR_MLOCK)),
+#endif
+#ifdef CONFIG_HIGHMEM
+ K(i.totalhigh),
+ K(i.freehigh),
+ K(i.totalram-i.totalhigh),
+ K(i.freeram-i.freehigh),
+#endif
+ K(i.totalswap),
+ K(i.freeswap),
+ K(global_page_state(NR_FILE_DIRTY)),
+ K(global_page_state(NR_WRITEBACK)),
+ K(global_page_state(NR_ANON_PAGES)),
+ K(global_page_state(NR_FILE_MAPPED)),
+ K(global_page_state(NR_SLAB_RECLAIMABLE) +
+ global_page_state(NR_SLAB_UNRECLAIMABLE)),
+ K(global_page_state(NR_SLAB_RECLAIMABLE)),
+ K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
+ K(global_page_state(NR_PAGETABLE)),
+#ifdef CONFIG_QUICKLIST
+ K(quicklist_total_size()),
+#endif
+ K(global_page_state(NR_UNSTABLE_NFS)),
+ K(global_page_state(NR_BOUNCE)),
+ K(global_page_state(NR_WRITEBACK_TEMP)),
+ K(allowed),
+ K(committed),
+ (unsigned long)VMALLOC_TOTAL >> 10,
+ vmi.used >> 10,
+ vmi.largest_chunk >> 10
+ );
+
+ hugetlb_report_meminfo(m);
+
+ arch_report_meminfo(m);
+
+ return 0;
+#undef K
+}
+
+static int meminfo_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, meminfo_proc_show, NULL);
+}
+
+static const struct file_operations meminfo_proc_fops = {
+ .open = meminfo_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init proc_meminfo_init(void)
+{
+ proc_create("meminfo", 0, NULL, &meminfo_proc_fops);
+ return 0;
+}
+module_init(proc_meminfo_init);