The patch titled
Subject: c/r: procfs: add start_data, end_data, start_brk members to /proc/$pid/stat v4
has been added to the -mm tree. Its filename is
c-r-procfs-add-start_data-end_data-start_brk-members-to-proc-pid-stat-v4.patch
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------------------------------------------------------
From: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Subject: c/r: procfs: add start_data, end_data, start_brk members to /proc/$pid/stat v4
The mm->start_code/end_code, mm->start_data/end_data, mm->start_brk are
involved into calculation of program text/data segment sizes (which might
be seen in /proc/<pid>/statm) and into brk() call final address.
For restore we need to know all these values. While
mm->start_code/end_code already present in /proc/$pid/stat, the rest
members are not, so this patch brings them in.
The restore procedure of these members is addressed in another patch using
prctl().
Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Acked-by: Serge Hallyn <serge.hallyn@xxxxxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Andrew Vagin <avagin@xxxxxxxxxx>
Cc: Vasiliy Kulikov <segoon@xxxxxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/filesystems/proc.txt | 3 +++
fs/proc/array.c | 7 +++++--
2 files changed, 8 insertions(+), 2 deletions(-)
diff -puN Documentation/filesystems/proc.txt~c-r-procfs-add-start_data-end_data-start_brk-members-to-proc-pid-stat-v4 Documentation/filesystems/proc.txt
--- a/Documentation/filesystems/proc.txt~c-r-procfs-add-start_data-end_data-start_brk-members-to-proc-pid-stat-v4
+++ a/Documentation/filesystems/proc.txt
@@ -307,6 +307,9 @@ Table 1-4: Contents of the stat files (a
blkio_ticks time spent waiting for block IO
gtime guest time of the task in jiffies
cgtime guest time of the task children in jiffies
+ start_data address above which program data+bss is placed
+ end_data address below which program data+bss is placed
+ start_brk address above which program heap can be expaned with brk() call
..............................................................................
The /proc/PID/maps file containing the currently mapped memory regions and
diff -puN fs/proc/array.c~c-r-procfs-add-start_data-end_data-start_brk-members-to-proc-pid-stat-v4 fs/proc/array.c
--- a/fs/proc/array.c~c-r-procfs-add-start_data-end_data-start_brk-members-to-proc-pid-stat-v4
+++ a/fs/proc/array.c
@@ -464,7 +464,7 @@ static int do_task_stat(struct seq_file
seq_printf(m, "%d (%s) %c %d %d %d %d %d %u %lu \
%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
-%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n",
+%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld %lu %lu %lu\n",
pid_nr_ns(pid, ns),
tcomm,
state,
@@ -511,7 +511,10 @@ static int do_task_stat(struct seq_file
task->policy,
(unsigned long long)delayacct_blkio_ticks(task),
cputime_to_clock_t(gtime),
- cputime_to_clock_t(cgtime));
+ cputime_to_clock_t(cgtime),
+ (mm && permitted) ? mm->start_data : 0,
+ (mm && permitted) ? mm->end_data : 0,
+ (mm && permitted) ? mm->start_brk : 0);
if (mm)
mmput(mm);
return 0;
_
Subject: Subject: c/r: procfs: add start_data, end_data, start_brk members to /proc/$pid/stat v4
Patches currently in -mm which might be from gorcunov@xxxxxxxxxx are
linux-next.patch
procfs-make-proc_get_link-to-use-dentry-instead-of-inode.patch
procfs-introduce-the-proc-pid-map_files-directory.patch
procfs-introduce-the-proc-pid-map_files-directory-checkpatch-fixes.patch
sysctl-add-the-kernelns_last_pid-control.patch
c-r-introduce-checkpoint_restore-symbol.patch
c-r-procfs-add-start_data-end_data-start_brk-members-to-proc-pid-stat-v4.patch
c-r-procfs-add-start_data-end_data-start_brk-members-to-proc-pid-stat-v4-fix.patch
c-r-prctl-add-pr_set_mm-codes-to-set-up-mm_struct-entries.patch
c-r-prctl-add-pr_set_mm-codes-to-set-up-mm_struct-entries-fix.patch
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