Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933254AbaJWCuH (ORCPT ); Wed, 22 Oct 2014 22:50:07 -0400 Received: from relay2.sgi.com ([192.48.180.65]:52660 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932402AbaJWCtf (ORCPT ); Wed, 22 Oct 2014 22:49:35 -0400 From: Alex Thorlton To: linux-mm@kvack.org, athorlton@sgi.com Cc: Andrew Morton , Bob Liu , David Rientjes , "Eric W. Biederman" , Hugh Dickins , Ingo Molnar , Kees Cook , "Kirill A. Shutemov" , Mel Gorman , Oleg Nesterov , Peter Zijlstra , Rik van Riel , Thomas Gleixner , Vladimir Davydov , linux-kernel@vger.kernel.org Subject: [PATCH 4/4] Add /proc files to expose per-mm pgcollapse stats Date: Wed, 22 Oct 2014 21:49:27 -0500 Message-Id: <1414032567-109765-5-git-send-email-athorlton@sgi.com> X-Mailer: git-send-email 1.7.12.4 In-Reply-To: <1414032567-109765-1-git-send-email-athorlton@sgi.com> References: <1414032567-109765-1-git-send-email-athorlton@sgi.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Cc: Andrew Morton Cc: Bob Liu Cc: David Rientjes Cc: Eric W. Biederman Cc: Hugh Dickins Cc: Ingo Molnar Cc: Kees Cook Cc: Kirill A. Shutemov Cc: Mel Gorman Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Rik van Riel Cc: Thomas Gleixner Cc: Vladimir Davydov 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/