Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752094AbaFBF0A (ORCPT ); Mon, 2 Jun 2014 01:26:00 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41623 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750702AbaFBFZ6 (ORCPT ); Mon, 2 Jun 2014 01:25:58 -0400 From: Naoya Horiguchi To: Andrew Morton Cc: Konstantin Khlebnikov , Wu Fengguang , Arnaldo Carvalho de Melo , Borislav Petkov , "Kirill A. Shutemov" , Johannes Weiner , Rusty Russell , David Miller , Andres Freund , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC][PATCH 0/3] mm: introduce fincore() Date: Mon, 2 Jun 2014 01:24:56 -0400 Message-Id: <1401686699-9723-1-git-send-email-n-horiguchi@ah.jp.nec.com> In-Reply-To: <20140521193336.5df90456.akpm@linux-foundation.org> References: <20140521193336.5df90456.akpm@linux-foundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Due to the previous discussion[1], I learned that you people have discussed this system call a few times (but not conclusion) and it can solve my problem about pagecache scanning (see[2] for my motivation.) So I try it now. The main patch of this patchset is patch 2, and this is based on Johannes's previous version[3], so I CCed people who joined that discussion. While there might be controversies about the format of data copied from kernel to userspace, I take the Kirill's suggestion[4] which uses a flag to choose the data format, which is extensible and flexible (you can cut off some info if you don't need it.) And I added simple tests at patch 3, and patch 2 passes all the tests. Any comments are welcomed. [1] http://marc.info/?l=linux-kernel&m=140072606903894&w=2 [2] http://marc.info/?l=linux-mm&m=140072522603776&w=2 [3] http://thread.gmane.org/gmane.linux.kernel/1439212/focus=1441919 [4] http://marc.info/?l=linux-kernel&m=140075509611532&w=2 Thanks, Naoya Horiguchi --- Summary: Naoya Horiguchi (3): replace PAGECACHE_TAG_* definition with enumeration mm: introduce fincore() selftest: add test code for fincore() arch/x86/syscalls/syscall_64.tbl | 1 + include/linux/fs.h | 9 +- include/linux/syscalls.h | 2 + mm/Makefile | 2 +- mm/fincore.c | 362 +++++++++++++++++++++ tools/testing/selftests/Makefile | 1 + tools/testing/selftests/fincore/Makefile | 31 ++ .../selftests/fincore/create_hugetlbfs_file.c | 49 +++ tools/testing/selftests/fincore/fincore.c | 153 +++++++++ tools/testing/selftests/fincore/run_fincoretests | 355 ++++++++++++++++++++ 10 files changed, 961 insertions(+), 4 deletions(-) -- 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/