From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754793Ab1GNNQ0 (ORCPT ); Thu, 14 Jul 2011 09:16:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34692 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754585Ab1GNNQZ (ORCPT ); Thu, 14 Jul 2011 09:16:25 -0400 From: Frantisek Hrbata To: linux-kernel@vger.kernel.org Cc: oleg@redhat.com, matt.fleming@linux.intel.com, hughd@google.com Subject: [PATCH] exec: remove page_table_lock for mm counters in acct_arg_size() Date: Thu, 14 Jul 2011 15:16:20 +0200 Message-Id: <1310649380-13492-1-git-send-email-fhrbata@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit 172703b mm: delete non-atomic mm counter implementation removed non-atomic mm counters implementation. I think there is no need to hold page_table_lock for add_mm_counter() when the splitted page table locks are not used. This patch removes the locking. Signed-off-by: Frantisek Hrbata --- fs/exec.c | 6 ------ 1 files changed, 0 insertions(+), 6 deletions(-) diff --git a/fs/exec.c b/fs/exec.c index 6075a1e..e6fc5e1 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -182,13 +182,7 @@ static void acct_arg_size(struct linux_binprm *bprm, unsigned long pages) bprm->vma_pages = pages; -#ifdef SPLIT_RSS_COUNTING add_mm_counter(mm, MM_ANONPAGES, diff); -#else - spin_lock(&mm->page_table_lock); - add_mm_counter(mm, MM_ANONPAGES, diff); - spin_unlock(&mm->page_table_lock); -#endif } static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos, -- 1.7.4.4