From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_MUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2574DC04AAC for ; Mon, 20 May 2019 14:27:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E43E8213F2 for ; Mon, 20 May 2019 14:27:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="IE9rXBhT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391557AbfETO1W (ORCPT ); Mon, 20 May 2019 10:27:22 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:39610 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390076AbfETO1U (ORCPT ); Mon, 20 May 2019 10:27:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=HpHK7d9UhVQk6/UDLmcKvRAr3yC+xCmCY5CGJZTfZXc=; b=IE9rXBhT2+Fpt4GF81TIhGa6B 0MoKbpt/Tjeg51MoV5X92xaKdt0bW0lt7c5X/6IPmOfPW5Dmvs6+cn0SaqWCFlEwFxydUxXiwGlmj LKwnQho5efQK+HlMK3H2tG9B5ZFk6qWK4XUHvo2X9ItQdfpNC/JeibKdeUEc4exAMtd0s9GggiXg/ /n24bPO+ZxK+61XDPkHgUOs8GFk0d3SINW9VZL4aaAOUe5VRp2TorL6CkZucByg/Jgp7XgUAfO2cw Sn5FpgonxEAzLbW/umHa+jfOrVedJikTx9SPKX1sHHeg7vsgYwlEq0N1d8SQFFBT0j/yivx9dpwiG dwPcptiiQ==; Received: from hch by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1hSjG3-0006Ti-Lt; Mon, 20 May 2019 14:27:19 +0000 Date: Mon, 20 May 2019 07:27:19 -0700 From: 'Christoph Hellwig' To: kanchan Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, prakash.v@samsung.com, anshul@samsung.com, "Martin K. Petersen" Subject: Re: [PATCH v5 0/7] Extend write-hint framework, and add write-hint for Ext4 journal Message-ID: <20190520142719.GA15705@infradead.org> References: <1556191202-3245-1-git-send-email-joshi.k@samsung.com> <20190510170249.GA26907@infradead.org> <00fb01d50c71$dd358e50$97a0aaf0$@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00fb01d50c71$dd358e50$97a0aaf0$@samsung.com> User-Agent: Mutt/1.9.2 (2017-12-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 17, 2019 at 11:01:55AM +0530, kanchan wrote: > Sorry but can you please elaborate the issue? I do not get what is being > statically allocated which was globally available earlier. > If you are referring to nvme driver, available streams at subsystem level > are being reflected for all namespaces. This is same as earlier. > There is no attempt to explicitly allocate (using dir-receive) or reserve > streams for any namespace. > Streams will continue to get allocated/released implicitly as and when > writes (with stream id) arrive. We have made a concious decision that we do not want to expose streams as an awkward not fish not flesh interface, but instead life time hints. I see no reason to change from and burden the whole streams complexity on other in-kernel callers.