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 <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Bob Liu <[email protected]> Cc: David Rientjes <[email protected]> Cc: Eric W. Biederman <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Kees Cook <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vladimir Davydov <[email protected]> Cc: [email protected] --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
