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authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>2013-11-12 15:07:49 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 12:09:07 +0900
commitec8e41aec13005fed0dbee002fb8c99b4e001d50 (patch)
treec14fee4cc32360055870d89b0256931a2c7e67bf
parentbfc4f9d5206739d0612782508a39e93b0793609d (diff)
/proc/pid/smaps: show VM_SOFTDIRTY flag in VmFlags line
This flag shows that the VMA is "newly created" and thus represents "dirty" in the task's VM. You can clear it by "echo 4 > /proc/pid/clear_refs." Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Pavel Emelyanov <xemul@parallels.com> Acked-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/filesystems/proc.txt1
-rw-r--r--fs/proc/task_mmu.c3
2 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 823c95faebd2..22d89aa37218 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -460,6 +460,7 @@ manner. The codes are the following:
nl - non-linear mapping
ar - architecture specific flag
dd - do not include area into core dump
+ sd - soft-dirty flag
mm - mixed map area
hg - huge page advise flag
nh - no-huge page advise flag
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 9f1369fe0afb..abbe825d20ff 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -561,6 +561,9 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
[ilog2(VM_NONLINEAR)] = "nl",
[ilog2(VM_ARCH_1)] = "ar",
[ilog2(VM_DONTDUMP)] = "dd",
+#ifdef CONFIG_MEM_SOFT_DIRTY
+ [ilog2(VM_SOFTDIRTY)] = "sd",
+#endif
[ilog2(VM_MIXEDMAP)] = "mm",
[ilog2(VM_HUGEPAGE)] = "hg",
[ilog2(VM_NOHUGEPAGE)] = "nh",