From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752929Ab2KSHRg (ORCPT ); Mon, 19 Nov 2012 02:17:36 -0500 Received: from mail-pb0-f46.google.com ([209.85.160.46]:43018 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752819Ab2KSHRd (ORCPT ); Mon, 19 Nov 2012 02:17:33 -0500 Message-ID: <1353309387.12210.0.camel@erika> Subject: [PATCH] Enable /proc/diskstats for /dev/ramX From: Ryo Onodera To: Nick Piggin Cc: linux-kernel@vger.kernel.org Date: Mon, 19 Nov 2012 16:16:27 +0900 Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Ryo Onodera --- drivers/block/brd.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/block/brd.c b/drivers/block/brd.c index 531ceb3..181b2d7 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -332,6 +332,7 @@ static void brd_make_request(struct request_queue *q, struct bio *bio) sector_t sector; int i; int err = -EIO; + int cpu; sector = bio->bi_sector; if (sector + (bio->bi_size >> SECTOR_SHIFT) > @@ -348,6 +349,12 @@ static void brd_make_request(struct request_queue *q, struct bio *bio) if (rw == READA) rw = READ; + cpu = part_stat_lock(); + part_stat_inc(cpu, &brd->brd_disk->part0, ios[rw]); + part_stat_add(cpu, &brd->brd_disk->part0, sectors[rw], + bio_sectors(bio)); + part_stat_unlock(); + bio_for_each_segment(bvec, bio, i) { unsigned int len = bvec->bv_len; err = brd_do_bvec(brd, bvec->bv_page, len, -- 1.7.9.5