Commit 8e68d689 authored by Vlastimil Babka's avatar Vlastimil Babka Committed by Linus Torvalds
Browse files

mm: /proc/pid/smaps: factor out mem stats gathering 

To prepare for handling /proc/pid/smaps_rollup differently from
/proc/pid/smaps factor out vma mem stats gathering from show_smap() - it
will be used by both.

Link: http://lkml.kernel.org/r/20180723111933.15443-3-vbabka@suse.cz


Signed-off-by: default avatarVlastimil Babka <vbabka@suse.cz>
Reviewed-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Cc: Daniel Colascione <dancol@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 871305bb

fs/proc/task_mmu.c

+31 −24
Original line number Diff line number Diff line
@@ -702,14 +702,9 @@ static int smaps_hugetlb_range(pte_t *pte, unsigned long hmask, 
}

#endif /* HUGETLB_PAGE */



#define SEQ_PUT_DEC(str, val) \

		seq_put_decimal_ull_width(m, str, (val) >> 10, 8)

static int show_smap(struct seq_file *m, void *v)

static void smap_gather_stats(struct vm_area_struct *vma,

			     struct mem_size_stats *mss)

{

	struct proc_maps_private *priv = m->private;

	struct vm_area_struct *vma = v;

	struct mem_size_stats mss_stack;

	struct mem_size_stats *mss;

	struct mm_walk smaps_walk = {

		.pmd_entry = smaps_pte_range,

#ifdef CONFIG_HUGETLB_PAGE
@@ -717,23 +712,6 @@ static int show_smap(struct seq_file *m, void *v) 
#endif

		.mm = vma->vm_mm,

	};

	int ret = 0;

	bool rollup_mode;

	bool last_vma;



	if (priv->rollup) {

		rollup_mode = true;

		mss = priv->rollup;

		if (mss->first) {

			mss->first_vma_start = vma->vm_start;

			mss->first = false;

		}

		last_vma = !m_next_vma(priv, vma);

	} else {

		rollup_mode = false;

		memset(&mss_stack, 0, sizeof(mss_stack));

		mss = &mss_stack;

	}



	smaps_walk.private = mss;
@@ -765,6 +743,35 @@ static int show_smap(struct seq_file *m, void *v) 
	walk_page_vma(vma, &smaps_walk);

	if (vma->vm_flags & VM_LOCKED)

		mss->pss_locked += mss->pss;

}



#define SEQ_PUT_DEC(str, val) \

		seq_put_decimal_ull_width(m, str, (val) >> 10, 8)

static int show_smap(struct seq_file *m, void *v)

{

	struct proc_maps_private *priv = m->private;

	struct vm_area_struct *vma = v;

	struct mem_size_stats mss_stack;

	struct mem_size_stats *mss;

	int ret = 0;

	bool rollup_mode;

	bool last_vma;



	if (priv->rollup) {

		rollup_mode = true;

		mss = priv->rollup;

		if (mss->first) {

			mss->first_vma_start = vma->vm_start;

			mss->first = false;

		}

		last_vma = !m_next_vma(priv, vma);

	} else {

		rollup_mode = false;

		memset(&mss_stack, 0, sizeof(mss_stack));

		mss = &mss_stack;

	}



	smap_gather_stats(vma, mss);



	if (!rollup_mode) {

		show_map_vma(m, vma);

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