Messages in this thread Patch in this message |  | | From | Alex Thorlton <> | Subject | [PATCH 4/4] Add /proc files to expose per-mm pgcollapse stats | Date | Wed, 22 Oct 2014 21:49:27 -0500 |
| |
This patch adds a /proc file to read out the information that we've added to the task_struct. I'll need to split the information out to separate files, probably in a subdirectory, change a few of the files to allow us to modify their values, and it will need appropriate locks.
Signed-off-by: Alex Thorlton <athorlton@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Bob Liu <lliubbo@gmail.com> Cc: David Rientjes <rientjes@google.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vladimir Davydov <vdavydov@parallels.com> Cc: linux-kernel@vger.kernel.org
--- fs/proc/base.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/fs/proc/base.c b/fs/proc/base.c index 772efa4..7c5aca2 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -2466,6 +2466,25 @@ 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) +{ + /* need locks here */ + seq_printf(m, "pages_to_scan: %u\n", tsk->pgcollapse_pages_to_scan); + seq_printf(m, "pages_collapsed: %u\n", tsk->pgcollapse_pages_collapsed); + seq_printf(m, "full_scans: %u\n", tsk->pgcollapse_full_scans); + seq_printf(m, "scan_sleep_millisecs: %u\n", + tsk->pgcollapse_scan_sleep_millisecs); + seq_printf(m, "alloc_sleep_millisecs: %u\n", + tsk->pgcollapse_alloc_sleep_millisecs); + seq_printf(m, "last_scan: %lu\n", tsk->pgcollapse_last_scan); + seq_printf(m, "scan_address: 0x%0lx\n", tsk->pgcollapse_scan_address); + + 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 +2595,9 @@ 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 +2936,9 @@ 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
|  |