[PATCH 03/31] proc: switch /proc/meminfo to seq_file
From: Alexey Dobriyan
Date: Wed Oct 15 2008 - 15:50:22 EST
and move it to fs/proc/meminfo.c while I'm at it.
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---
arch/x86/mm/pageattr.c | 11 ++--
fs/proc/Makefile | 1 +
fs/proc/meminfo.c | 147 +++++++++++++++++++++++++++++++++++++++++++++
fs/proc/proc_misc.c | 116 -----------------------------------
include/asm-x86/pgtable.h | 3 +-
include/linux/hugetlb.h | 6 +-
mm/hugetlb.c | 5 +-
7 files changed, 162 insertions(+), 127 deletions(-)
create mode 100644 fs/proc/meminfo.c
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index a9ec89c..f782a27 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -65,23 +65,22 @@ static void split_page_count(int level)
direct_pages_count[level - 1] += PTRS_PER_PTE;
}
-int arch_report_meminfo(char *page)
+void arch_report_meminfo(struct seq_file *m)
{
- int n = sprintf(page, "DirectMap4k: %8lu kB\n",
+ seq_printf(m, "DirectMap4k: %8lu kB\n",
direct_pages_count[PG_LEVEL_4K] << 2);
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
- n += sprintf(page + n, "DirectMap2M: %8lu kB\n",
+ seq_printf(m, "DirectMap2M: %8lu kB\n",
direct_pages_count[PG_LEVEL_2M] << 11);
#else
- n += sprintf(page + n, "DirectMap4M: %8lu kB\n",
+ seq_printf(m, "DirectMap4M: %8lu kB\n",
direct_pages_count[PG_LEVEL_2M] << 12);
#endif
#ifdef CONFIG_X86_64
if (direct_gbpages)
- n += sprintf(page + n, "DirectMap1G: %8lu kB\n",
+ seq_printf(m, "DirectMap1G: %8lu kB\n",
direct_pages_count[PG_LEVEL_1G] << 20);
#endif
- return n;
}
#else
static inline void split_page_count(int level) { }
diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index 27efa14..70607a0 100644
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -10,6 +10,7 @@ proc-$(CONFIG_MMU) := mmu.o task_mmu.o
proc-y += inode.o root.o base.o generic.o array.o \
proc_tty.o proc_misc.o
proc-y += loadavg.o
+proc-y += meminfo.o
proc-y += uptime.o
proc-$(CONFIG_PROC_SYSCTL) += proc_sysctl.o
proc-$(CONFIG_NET) += proc_net.o
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
new file mode 100644
index 0000000..5036786
--- /dev/null
+++ b/fs/proc/meminfo.c
@@ -0,0 +1,147 @@
+#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;
+
+/*
+ * 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);
+
+ /*
+ * 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"
+#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(global_page_state(NR_ACTIVE)),
+ K(global_page_state(NR_INACTIVE)),
+#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);
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 6c520f4..573dc9e 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -77,121 +77,6 @@ static int proc_calc_metrics(char *page, char **start, off_t off,
return len;
}
-int __attribute__((weak)) arch_report_meminfo(char *page)
-{
- return 0;
-}
-
-static int meminfo_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- struct sysinfo i;
- int len;
- unsigned long committed;
- unsigned long allowed;
- struct vmalloc_info vmi;
- long cached;
-
-/*
- * 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);
-
- /*
- * Tagged format, for easy grepping and expansion.
- */
- len = sprintf(page,
- "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"
-#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(global_page_state(NR_ACTIVE)),
- K(global_page_state(NR_INACTIVE)),
-#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
- );
-
- len += hugetlb_report_meminfo(page + len);
-
- len += arch_report_meminfo(page + len);
-
- return proc_calc_metrics(page, start, off, count, eof, len);
-#undef K
-}
-
static int fragmentation_open(struct inode *inode, struct file *file)
{
(void)inode;
@@ -797,7 +682,6 @@ void __init proc_misc_init(void)
char *name;
int (*read_proc)(char*,char**,off_t,int,int*,void*);
} *p, simple_ones[] = {
- {"meminfo", meminfo_read_proc},
{"version", version_read_proc},
#ifdef CONFIG_PROC_HARDWARE
{"hardware", hardware_read_proc},
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
index 88a53b1..a3dda6d 100644
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -348,7 +348,8 @@ static inline void native_pagetable_setup_start(pgd_t *base) {}
static inline void native_pagetable_setup_done(pgd_t *base) {}
#endif
-extern int arch_report_meminfo(char *page);
+struct seq_file;
+extern void arch_report_meminfo(struct seq_file *m);
#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 32e0ef0..e1c8afc 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -27,7 +27,7 @@ void unmap_hugepage_range(struct vm_area_struct *,
void __unmap_hugepage_range(struct vm_area_struct *,
unsigned long, unsigned long, struct page *);
int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
-int hugetlb_report_meminfo(char *);
+void hugetlb_report_meminfo(struct seq_file *);
int hugetlb_report_node_meminfo(int, char *);
unsigned long hugetlb_total_pages(void);
int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
@@ -79,7 +79,9 @@ static inline unsigned long hugetlb_total_pages(void)
#define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
#define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
#define unmap_hugepage_range(vma, start, end, page) BUG()
-#define hugetlb_report_meminfo(buf) 0
+static inline void hugetlb_report_meminfo(struct seq_file *m)
+{
+}
#define hugetlb_report_node_meminfo(n, buf) 0
#define follow_huge_pmd(mm, addr, pmd, write) NULL
#define follow_huge_pud(mm, addr, pud, write) NULL
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 3863386..85ade11 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -7,6 +7,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
+#include <linux/seq_file.h>
#include <linux/sysctl.h>
#include <linux/highmem.h>
#include <linux/mmu_notifier.h>
@@ -1455,10 +1456,10 @@ int hugetlb_overcommit_handler(struct ctl_table *table, int write,
#endif /* CONFIG_SYSCTL */
-int hugetlb_report_meminfo(char *buf)
+void hugetlb_report_meminfo(struct seq_file *m)
{
struct hstate *h = &default_hstate;
- return sprintf(buf,
+ seq_printf(m,
"HugePages_Total: %5lu\n"
"HugePages_Free: %5lu\n"
"HugePages_Rsvd: %5lu\n"
--
1.5.6.5
--
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