Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp4717833imu; Mon, 12 Nov 2018 16:07:40 -0800 (PST) X-Google-Smtp-Source: AJdET5d/pG87j4tVrdkzvAhWljSTY13zaapX7Wqn+ppq9Ea+pYpUv+j98h/9l89OBI/uXJNCVXZa X-Received: by 2002:a17:902:9a9:: with SMTP id 38-v6mr2950142pln.180.1542067660622; Mon, 12 Nov 2018 16:07:40 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1542067660; cv=none; d=google.com; s=arc-20160816; b=ZV9qi7OEyusAW54MjiscajKRZnaEDVUqeiK5n741MOq1V+wOp+/8jOqo8rDFO3C77q zhIuBi7A9MaExIWXKVs+42VGBTelZlOivyY1H22bG78gWR7PpAWExS/y7gUC26amioCk NVvDRb6UcWKa4CYhhbxKeoOTs7Y6fwTdjgTeDgpxU0U96kVMo8Pw2FkuL1qd3zwTl3GW slhlNhcDCyd3K+GtYHpZU+DnEUq7vCOqRELRXwLVOeZlMjnZ5vd7B8rvSljSPFe1y+uZ MoVnpdBcFfNiiXRs1Ni3dh3CEDSw9eAbcX6/Xw8LkndIif2Knnu5wGMekGFYbqNymGAD HC0w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=fgYS71otplMBkgxC1t8emH777ae07010QZtXqo+iTtE=; b=M9BerC9fTS1nEI3WMF0NRWy6sZWJ3NXhUAR/FKPpATReNcGtreu/pbWDeR9HF8D353 kmvYDJa785mctvFyMXuk5Mf9XM/5pT+d3L1M3kBQNbm3esXXF/5dXXmOGbs9g0FyGq0n rPC0JFlurTt53usVfsck6owHzbh8qiHtSMNntwus1cI1v3uXr+9aQMHA2Q5bk8m0kGtx i2+5ZCAoz1TSR/fNMVf/0OYTcq3wiUpneoAOtJkNqx376C0Te9F4RmR9dVxIhx30idUn 2VRnGERx08BXqPEEhcbwfXreN2EGsczpzOPU0b5gU/RPOmjed4gZ4OEAz5u1XdrhMDoa OJXA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@cisco.com header.s=iport header.b=eer78BHN; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=cisco.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id q23-v6si18846179pll.178.2018.11.12.16.07.24; Mon, 12 Nov 2018 16:07:40 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@cisco.com header.s=iport header.b=eer78BHN; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=cisco.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730398AbeKMKB5 (ORCPT + 99 others); Tue, 13 Nov 2018 05:01:57 -0500 Received: from alln-iport-5.cisco.com ([173.37.142.92]:41562 "EHLO alln-iport-5.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725991AbeKMKB5 (ORCPT ); Tue, 13 Nov 2018 05:01:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=451; q=dns/txt; s=iport; t=1542067590; x=1543277190; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=uExxS9zyGKUbYfPAq25fEabkSZcvpRdj7YVWgh8NcXM=; b=eer78BHN5lNoJBRCdKCaUoX30jQWOQh1iZ4fF5zJDmQNE5Q45hMjl1SE afDk4Utyq5vBYJj0jtja/rpdTggUgIdNbpPiCcqAjxwEqrUljBovjKK8k SJoZ9iJE4HyAxuZyZOB9BRKpUxSawQ6v7i+b4uHuvTDLmuMhHQB/lq5lU g=; X-IronPort-AV: E=Sophos;i="5.54,497,1534809600"; d="scan'208";a="200208753" Received: from rcdn-core-10.cisco.com ([173.37.93.146]) by alln-iport-5.cisco.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Nov 2018 00:06:29 +0000 Received: from zorba ([10.156.154.32]) by rcdn-core-10.cisco.com (8.15.2/8.15.2) with ESMTPS id wAD06RGB003397 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 13 Nov 2018 00:06:29 GMT Date: Mon, 12 Nov 2018 16:06:27 -0800 From: Daniel Walker To: David Woodhouse Cc: "Nikunj Kela (nkela)" , Richard Weinberger , "linux-mtd @ lists . infradead . org" , LKML , "xe-linux-external(mailer list)" Subject: Re: [PATCH] jffs2: implement mount option to configure endianness Message-ID: <20181113000627.oe7cshgzfk4lf3to@zorba> References: <591D4732-BC3E-4F85-9277-25E049FFF4BA@cisco.com> <01b82f6eb37b674effc6c8b0fa4a014deb401a85.camel@infradead.org> <897867ec09af82ca76c642b48ad23a7f08838dcf.camel@infradead.org> <20181112214333.lplffcc722hta43v@zorba> <20181112225015.jyuro3z3ygavnvrp@zorba> <20181112234022.r3gyu633ln3bp774@zorba> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170609 (1.8.3) X-Auto-Response-Suppress: DR, OOF, AutoReply X-Outbound-SMTP-Client: 10.156.154.32, [10.156.154.32] X-Outbound-Node: rcdn-core-10.cisco.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 12, 2018 at 03:43:37PM -0800, David Woodhouse wrote: > > That can't hurt. We should probably look at the time elapsed before you > can *write* to it (when the background scan and crc checking is > complete) rather than just reading. > I'm not sure how to test that, but I tried this, mount -t jffs2 mtd7 /mnt ; perf stat -B dd if=/dev/zero of=/mnt/test bs 1 count=1; What would you suggest for testing this ? Daniel