On 2016-08-14 05:04 AM, Michal Hocko wrote:
On Fri 12-08-16 18:04:19, robert.foss@xxxxxxxxxxxxx wrote:
From: Robert Foss <robert.foss@xxxxxxxxxxxxx>
This series implements /proc/PID/totmaps, a tool for retrieving summarized
information about the mappings of a process.
The changelog is absolutely missing the usecase. Why do we need this?
Why existing interfaces are not sufficient?
You are absolutely right, more info information is in 1/3.
But the gist of it is that it provides a faster and more convenient way
of accessing the information in /proc/PID/smaps.
Changes since v1:
- Removed IS_ERR check from get_task_mm() function
- Changed comment format
- Moved proc_totmaps_operations declaration inside internal.h
- Switched to using do_maps_open() in totmaps_open() function,
which provides privilege checking
- Error handling reworked for totmaps_open() function
- Switched to stack allocated struct mem_size_stats mss_sum in
totmaps_proc_show() function
- Removed get_task_mm() in totmaps_proc_show() since priv->mm
already is available
- Added support to proc_map_release() fork priv==NULL, to allow
function to be used for all failure cases
- Added proc_totmaps_op and for it helper functions
- Added documention in separate patch
- Removed totmaps_release() since it was just a wrapper for
proc_map_release()
Robert Foss (3):
mm, proc: Implement /proc/<pid>/totmaps
Documentation/filesystems: Fixed typo
Documentation/filesystems: Added /proc/PID/totmaps documentation
Documentation/filesystems/proc.txt | 23 ++++++-
fs/proc/base.c | 1 +
fs/proc/internal.h | 3 +
fs/proc/task_mmu.c | 134 +++++++++++++++++++++++++++++++++++++
4 files changed, 160 insertions(+), 1 deletion(-)
--
2.7.4
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