From patchwork Wed Apr 6 06:04:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12802551 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E0D0C433F5 for ; Wed, 6 Apr 2022 06:06:21 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 167226B0073; Wed, 6 Apr 2022 02:05:58 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 117108D0001; Wed, 6 Apr 2022 02:05:58 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F20536B0075; Wed, 6 Apr 2022 02:05:57 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0222.hostedemail.com [216.40.44.222]) by kanga.kvack.org (Postfix) with ESMTP id E36AD6B0073 for ; Wed, 6 Apr 2022 02:05:57 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 95CAE183AB0B6 for ; Wed, 6 Apr 2022 06:05:47 +0000 (UTC) X-FDA: 79325417934.21.D7B8C94 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf27.hostedemail.com (Postfix) with ESMTP id 3163F40041 for ; Wed, 6 Apr 2022 06:05:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=sINtR+pRAAWqBCMZRslKVJyakyubEJXVW4tI3wGLsb0=; b=gBrZsvegbTHoIEG5qdijcHzNWW PfzclL3zzl2tB5xhm8Sj7w6skVV8SvvJytC4EH0RoMlbB62c3vMVvjooDHTIWQ3smYKaAuMQ4cOli spZhkrdfcyNNrOGeIUuTpGtX63bYCgqfiIr52xJMA9AGK42nQUGH/2eHVQ3foGEH/zFa8lWfGs7Pp Ay5KyAHLP9DhsOCOpCtbHRVbRjzyQdYUTq4TkVLaYR9+Sga+ljLLLtQo5Hukpu2Q5UAw6RMQTfLQg vt8zwwfekDfQOHpKLK7/INfKF40CQ8temfgKOOdrhB506dWycfStoRSbi1wi6owABwmVkNNzYqcsL kVwVOMFA==; Received: from 213-225-3-188.nat.highway.a1.net ([213.225.3.188] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nbynD-003ul3-Rn; Wed, 06 Apr 2022 06:05:24 +0000 From: Christoph Hellwig To: Jens Axboe Cc: dm-devel@redhat.com, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, ceph-devel@vger.kernel.org, virtualization@lists.linux-foundation.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mtd@lists.infradead.org, linux-nvme@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, jfs-discussion@lists.sourceforge.net, linux-nilfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@oss.oracle.com, linux-mm@kvack.org Subject: [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction Date: Wed, 6 Apr 2022 08:04:50 +0200 Message-Id: <20220406060516.409838-2-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220406060516.409838-1-hch@lst.de> References: <20220406060516.409838-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Stat-Signature: wuf9dkaix4jxm9a4txgnq9yw89a45yun Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=gBrZsveg; spf=none (imf27.hostedemail.com: domain of BATV+4210fbe0094d03a681f9+6800+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+4210fbe0094d03a681f9+6800+infradead.org+hch@bombadil.srs.infradead.org; dmarc=none X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 3163F40041 X-HE-Tag: 1649225147-731827 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: For block devices the target code implements UNMAP as calls to blkdev_issue_discard, which does not guarantee zeroing just because Write Zeroes is supported. Note that this does not affect the file backed path which uses fallocate to punch holes. Fixes: 2237498f0b5c ("target/iblock: Convert WRITE_SAME to blkdev_issue_zeroout") Signed-off-by: Christoph Hellwig Reviewed-by: Martin K. Petersen --- drivers/target/target_core_device.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 44bb380e7390c..fa866acef5bb2 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -850,7 +850,6 @@ bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib, attrib->unmap_granularity = q->limits.discard_granularity / block_size; attrib->unmap_granularity_alignment = q->limits.discard_alignment / block_size; - attrib->unmap_zeroes_data = !!(q->limits.max_write_zeroes_sectors); return true; } EXPORT_SYMBOL(target_configure_unmap_from_queue);