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Commit ec8e41ae authored by Naoya Horiguchi's avatar Naoya Horiguchi Committed by Linus Torvalds
Browse files

/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: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Acked-by: default avatarCyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bfc4f9d5

Documentation/filesystems/proc.txt

+1 −0
Original line number Diff line number Diff line
@@ -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

fs/proc/task_mmu.c

+3 −0
Original line number Diff line number Diff line
@@ -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",