From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759102Ab3K0Bqj (ORCPT ); Tue, 26 Nov 2013 20:46:39 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:39126 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932201Ab3K0A5x (ORCPT ); Tue, 26 Nov 2013 19:57:53 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lukasz Flis , Mike Snitzer , Jens Axboe Subject: [PATCH 3.10 64/80] block: properly stack underlying max_segment_size to DM device Date: Tue, 26 Nov 2013 16:57:33 -0800 Message-Id: <20131127005645.381451346@linuxfoundation.org> X-Mailer: git-send-email 1.8.5.rc3 In-Reply-To: <20131127005640.934155527@linuxfoundation.org> References: <20131127005640.934155527@linuxfoundation.org> User-Agent: quilt/0.60-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mike Snitzer commit d82ae52e68892338068e7559a0c0657193341ce4 upstream. Without this patch all DM devices will default to BLK_MAX_SEGMENT_SIZE (65536) even if the underlying device(s) have a larger value -- this is due to blk_stack_limits() using min_not_zero() when stacking the max_segment_size limit. 1073741824 before patch: 65536 after patch: 1073741824 Reported-by: Lukasz Flis Signed-off-by: Mike Snitzer Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- block/blk-settings.c | 1 + 1 file changed, 1 insertion(+) --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -144,6 +144,7 @@ void blk_set_stacking_limits(struct queu lim->discard_zeroes_data = 1; lim->max_segments = USHRT_MAX; lim->max_hw_sectors = UINT_MAX; + lim->max_segment_size = UINT_MAX; lim->max_sectors = UINT_MAX; lim->max_write_same_sectors = UINT_MAX; }