Just add a proc file to expose the stat counter I added.
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Bob Liu <lliu...@gmail.com>
Cc: David Rientjes <rient...@google.com>
Cc: Eric W. Biederman <ebied...@xmission.com>
Cc: Hugh Dickins <hu...@google.com>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Kees Cook <keesc...@chromium.org>
Cc: Kirill A. Shutemov <kirill.shute...@linux.intel.com>
Cc: Mel Gorman <mgor...@suse.de>
Cc: Oleg Nesterov <o...@redhat.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Rik van Riel <r...@redhat.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Vladimir Davydov <vdavy...@parallels.com>
Cc: linux-kernel@vger.kernel.org
---
fs/proc/base.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 772efa4..7517bf4 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2466,6 +2466,16 @@ static const struct file_operations
proc_projid_map_operations = {
};
#endif /* CONFIG_USER_NS */
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+int proc_pgcollapse_show(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *tsk)
+{
+ seq_printf(m, "pages_collapsed: %u\n", tsk->pgcollapse_pages_collapsed);
+
+ return 0;
+}
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+
static int proc_pid_personality(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task)
{
@@ -2576,6 +2586,9 @@ static const struct pid_entry tgid_base_stuff[] = {
#ifdef CONFIG_CHECKPOINT_RESTORE
REG("timers", S_IRUGO, proc_timers_operations),
#endif
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+ ONE("pgcollapse", S_IRUGO, proc_pgcollapse_show),
+#endif
};
static int proc_tgid_base_readdir(struct file *file, struct dir_context *ctx)
@@ -2914,6 +2927,9 @@ static const struct pid_entry tid_base_stuff[] = {
REG("gid_map", S_IRUGO|S_IWUSR, proc_gid_map_operations),
REG("projid_map", S_IRUGO|S_IWUSR, proc_projid_map_operations),
#endif
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+ ONE("pgcollapse", S_IRUGO, proc_pgcollapse_show),
+#endif
};
static int proc_tid_base_readdir(struct file *file, struct dir_context *ctx)
--
1.7.12.4
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