The patch titled
Subject: proc/smaps: show amount of nonlinear ptes in vma
has been added to the -mm tree. Its filename is
proc-smaps-show-amount-of-nonlinear-ptes-in-vma.patch
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From: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx>
Subject: proc/smaps: show amount of nonlinear ptes in vma
Currently, nonlinear mappings can not be distinguished from ordinary
mappings. This patch adds into /proc/pid/smaps line "Nonlinear: <size>
kB", where size is amount of nonlinear ptes in vma, this line appears only
if VM_NONLINEAR is set. This information may be useful not only for
checkpoint/restore project.
Requested by Pavel Emelyanov.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff -puN fs/proc/task_mmu.c~proc-smaps-show-amount-of-nonlinear-ptes-in-vma fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~proc-smaps-show-amount-of-nonlinear-ptes-in-vma
+++ a/fs/proc/task_mmu.c
@@ -393,6 +393,7 @@ struct mem_size_stats {
unsigned long anonymous;
unsigned long anonymous_thp;
unsigned long swap;
+ unsigned long nonlinear;
u64 pss;
};
@@ -402,6 +403,7 @@ static void smaps_pte_entry(pte_t ptent,
{
struct mem_size_stats *mss = walk->private;
struct vm_area_struct *vma = mss->vma;
+ pgoff_t pgoff = linear_page_index(vma, addr);
struct page *page = NULL;
int mapcount;
@@ -414,6 +416,9 @@ static void smaps_pte_entry(pte_t ptent,
mss->swap += ptent_size;
else if (is_migration_entry(swpent))
page = migration_entry_to_page(swpent);
+ } else if (pte_file(ptent)) {
+ if (pte_to_pgoff(ptent) != pgoff)
+ mss->nonlinear += ptent_size;
}
if (!page)
@@ -422,6 +427,9 @@ static void smaps_pte_entry(pte_t ptent,
if (PageAnon(page))
mss->anonymous += ptent_size;
+ if (page->index != pgoff)
+ mss->nonlinear += ptent_size;
+
mss->resident += ptent_size;
/* Accumulate the size in pages that have been accessed. */
if (pte_young(ptent) || PageReferenced(page))
@@ -523,6 +531,10 @@ static int show_smap(struct seq_file *m,
(vma->vm_flags & VM_LOCKED) ?
(unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0);
+ if (vma->vm_flags & VM_NONLINEAR)
+ seq_printf(m, "Nonlinear: %8lu kB\n",
+ mss.nonlinear >> 10);
+
if (m->count < m->size) /* vma is copied successfully */
m->version = (vma != get_gate_vma(task->mm))
? vma->vm_start : 0;
_
Subject: Subject: proc/smaps: show amount of nonlinear ptes in vma
Patches currently in -mm which might be from khlebnikov@xxxxxxxxxx are
linux-next.patch
mm-remove-swap-token-code.patch
mm-vmscan-remove-lumpy-reclaim.patch
mm-vmscan-do-not-stall-on-writeback-during-memory-compaction.patch
mm-vmscan-remove-reclaim_mode_t.patch
mm-correctly-synchronize-rss-counters-at-exit-exec.patch
kernel-cgroup-push-rcu-read-locking-from-css_is_ancestor-to-callsite.patch
mm-memcg-count-pte-references-from-every-member-of-the-reclaimed-hierarchy.patch
mm-memcg-count-pte-references-from-every-member-of-the-reclaimed-hierarchy-fix.patch
mm-memcg-scanning_global_lru-means-mem_cgroup_disabled.patch
mm-memcg-move-reclaim_stat-into-lruvec.patch
mm-push-lru-index-into-shrink_active_list.patch
mm-push-lru-index-into-shrink_active_list-fix.patch
mm-mark-mm-inline-functions-as-__always_inline.patch
mm-remove-lru-type-checks-from-__isolate_lru_page.patch
mm-memcg-kill-mem_cgroup_lru_del.patch
mm-memcg-use-vm_swappiness-from-target-memory-cgroup.patch
proc-smaps-carefully-handle-migration-entries.patch
proc-smaps-show-amount-of-nonlinear-ptes-in-vma.patch
proc-smaps-show-amount-of-hwpoison-pages.patch
fork-call-complete_vfork_done-after-clearing-child_tid-and-flushing-rss-counters.patch
c-r-prctl-add-ability-to-set-new-mm_struct-exe_file-update-after-mm-num_exe_file_vmas-removal.patch
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