lkml.org 
[lkml]   [2015]   [Jan]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2] fs: proc: task_mmu: show page size in /proc/<pid>/numa_maps
Date
This patch introduces 'kernelpagesize_kB' line element to /proc/<pid>/numa_maps
report file in order to help identifying the size of pages that are backing
memory areas mapped by a given task. This is specially useful to
help differentiating between HUGE and GIGANTIC page backed VMAs.

This patch is based on Dave Hansen's proposal and reviewer's follow-ups
taken from the following dicussion threads:
* https://lkml.org/lkml/2011/9/21/454
* https://lkml.org/lkml/2014/12/20/66

Signed-off-by: Rafael Aquini <aquini@redhat.com>
---
* v2 changelog:
. print kernel page size unconditionally (jweiner, dhansen)
. rename pagesize to match smaps terminology (dhansen, drientjes)

fs/proc/task_mmu.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 246eae8..3688d64 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1533,6 +1533,8 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
if (!md->pages)
goto out;

+ seq_printf(m, " kernelpagesize_kB=%lu", vma_kernel_pagesize(vma) >> 10);
+
if (md->anon)
seq_printf(m, " anon=%lu", md->anon);

--
1.9.3


\
 
 \ /
  Last update: 2015-01-05 19:01    [W:0.298 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site