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Subject[PATCH 7/13] maps: Simplify interdependence of /proc/pid/maps and smaps
Date
Simplify interdependence of /proc/pid/maps and smaps

This pulls the shared map display code out of show_map and puts it in
show_smap where it belongs.

Signed-off-by: Matt Mackall <mpm@selenic.com>

Index: mm/fs/proc/task_mmu.c
===================================================================
--- mm.orig/fs/proc/task_mmu.c 2007-03-27 23:06:18.000000000 -0500
+++ mm/fs/proc/task_mmu.c 2007-03-29 13:01:44.000000000 -0500
@@ -125,7 +125,7 @@ struct mem_size_stats
unsigned long referenced;
};

-static int show_map_internal(struct seq_file *m, void *v, struct mem_size_stats *mss)
+static int show_map(struct seq_file *m, void *v)
{
struct proc_maps_private *priv = m->private;
struct task_struct *task = priv->task;
@@ -185,33 +185,11 @@ static int show_map_internal(struct seq_
}
seq_putc(m, '\n');

- if (mss)
- seq_printf(m,
- "Size: %8lu kB\n"
- "Rss: %8lu kB\n"
- "Shared_Clean: %8lu kB\n"
- "Shared_Dirty: %8lu kB\n"
- "Private_Clean: %8lu kB\n"
- "Private_Dirty: %8lu kB\n"
- "Referenced: %8lu kB\n",
- (vma->vm_end - vma->vm_start) >> 10,
- mss->resident >> 10,
- mss->shared_clean >> 10,
- mss->shared_dirty >> 10,
- mss->private_clean >> 10,
- mss->private_dirty >> 10,
- mss->referenced >> 10);
-
if (m->count < m->size) /* vma is copied successfully */
m->version = (vma != get_gate_vma(task))? vma->vm_start: 0;
return 0;
}

-static int show_map(struct seq_file *m, void *v)
-{
- return show_map_internal(m, v, NULL);
-}
-
static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
void *private)
{
@@ -286,13 +264,35 @@ static int show_smap(struct seq_file *m,
{
struct vm_area_struct *vma = v;
struct mem_size_stats mss;
+ int ret;

memset(&mss, 0, sizeof mss);
mss.vma = vma;
if (vma->vm_mm && !is_vm_hugetlb_page(vma))
walk_page_range(vma->vm_mm, vma->vm_start, vma->vm_end,
&smaps_walk, &mss);
- return show_map_internal(m, v, &mss);
+
+ ret = show_map(m, v);
+ if (ret)
+ return ret;
+
+ seq_printf(m,
+ "Size: %8lu kB\n"
+ "Rss: %8lu kB\n"
+ "Shared_Clean: %8lu kB\n"
+ "Shared_Dirty: %8lu kB\n"
+ "Private_Clean: %8lu kB\n"
+ "Private_Dirty: %8lu kB\n"
+ "Referenced: %8lu kB\n",
+ (vma->vm_end - vma->vm_start) >> 10,
+ mss.resident >> 10,
+ mss.shared_clean >> 10,
+ mss.shared_dirty >> 10,
+ mss.private_clean >> 10,
+ mss.private_dirty >> 10,
+ mss.referenced >> 10);
+
+ return ret;
}

static struct mm_walk clear_refs_walk = { .pmd_entry = clear_refs_pte_range };
-
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