From patchwork Sat Apr 13 13:40:16 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Namjae Jeon X-Patchwork-Id: 236354 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:770:15f::2]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 420122C008F for ; Sat, 13 Apr 2013 23:42:32 +1000 (EST) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UR0hY-0007W4-F3; Sat, 13 Apr 2013 13:41:10 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UR0h0-0004bc-DW; Sat, 13 Apr 2013 13:40:34 +0000 Received: from mail-da0-x231.google.com ([2607:f8b0:400e:c00::231]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UR0gx-0004b4-W1 for linux-mtd@lists.infradead.org; Sat, 13 Apr 2013 13:40:32 +0000 Received: by mail-da0-f49.google.com with SMTP id t11so1503379daj.36 for ; Sat, 13 Apr 2013 06:40:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:from:to:cc:subject:date:message-id:x-mailer; bh=x7VeK69sFzpE0k7kiUDXW/2az+H9dzF6XsYEvBG/0rU=; b=a4o/2Ajo3Ee3nWi7Act5V4zM7R7fmG+Rw6yV+Jkw0otyfXwfCVkrHIEVxssYx6ofM2 Aaa7/1wTF2qkWCRloZAe/H10dbdM6zmTCkudkQ8RKTZEFNArlDuOmEth06HZg5a6PMpH egCQQFymv5Qtc/ZPvpyZJKHqsOG+guaUGUlk/a8fVT9CGuXWinEggsMJBDMpXCCT/nT/ OK+v7Q54OfnaH7CN/olfUDtcQw4xXiJYiyOzJRmppkje7PfEZKODRygpqXDNpPYGDiY4 uDv7SzY/wedo4jNK9I3b9JvDGO+Gi2W8xwGwJeqxsn/p0XB1vvK3saR1WMCQAuyox5Eh HjRw== X-Received: by 10.67.3.39 with SMTP id bt7mr20409872pad.161.1365860427144; Sat, 13 Apr 2013 06:40:27 -0700 (PDT) Received: from linkinjeon-Aspire-One-522.kornet ([121.143.184.70]) by mx.google.com with ESMTPS id mt13sm12677429pbc.15.2013.04.13.06.40.22 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sat, 13 Apr 2013 06:40:26 -0700 (PDT) From: Namjae Jeon To: dwmw2@infradead.org, axboe@kernel.dk, shli@kernel.org, Paul.Clements@steeleye.com, npiggin@kernel.dk, neilb@suse.de, cjb@laptop.org, adrian.hunter@intel.com Subject: [PATCH 8/8] bcache: use generic helper to set max_discard_sectors Date: Sat, 13 Apr 2013 22:40:16 +0900 Message-Id: <1365860416-21499-1-git-send-email-linkinjeon@gmail.com> X-Mailer: git-send-email 1.7.9.5 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130413_094032_140608_24CC662B X-CRM114-Status: GOOD ( 11.26 ) X-Spam-Score: -0.3 (/) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-0.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- 1.7 KHOP_BIG_TO_CC Sent to 10+ recipients instaed of Bcc or a list 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (linkinjeon[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature Cc: nbd-general@lists.sourceforge.net, Namjae Jeon , Vivek Trivedi , Namjae Jeon , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, linux-mtd@lists.infradead.org X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org From: Namjae Jeon It is better to use blk_queue_max_discard_sectors helper function to set max_discard_sectors as it checks max_discard_sectors upper limit UINT_MAX >> 9 similar issue was reported for mmc in below link https://lkml.org/lkml/2013/4/1/292 If multiple discard requests get merged, merged discard request's size exceeds 4GB, there is possibility that merged discard request's __data_len field may overflow. This patch fixes this issue. Signed-off-by: Namjae Jeon Signed-off-by: Vivek Trivedi --- drivers/md/bcache/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index f3bf310..d87ab31 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -746,7 +746,7 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size) q->limits.max_sectors = UINT_MAX; q->limits.max_segment_size = UINT_MAX; q->limits.max_segments = BIO_MAX_PAGES; - q->limits.max_discard_sectors = UINT_MAX; + blk_queue_max_discard_sectors(q, UINT_MAX >> 9); q->limits.io_min = block_size; q->limits.logical_block_size = block_size; q->limits.physical_block_size = block_size;