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=-5.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, USER_AGENT_MUTT autolearn=ham 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 0507BC43441 for ; Fri, 16 Nov 2018 08:41:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B6F6F2089D for ; Fri, 16 Nov 2018 08:41:56 +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="LKbCiFy5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B6F6F2089D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-block-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727567AbeKPSxR (ORCPT ); Fri, 16 Nov 2018 13:53:17 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:60998 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727550AbeKPSxQ (ORCPT ); Fri, 16 Nov 2018 13:53:16 -0500 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=rkyG39oqVlMEv8WnpEX9bSMSaF8eVOLZSUAUhMAxUJ0=; b=LKbCiFy5JeokljgaXqvfPaFD4 87fc2fxe6HAU8lEmATyzI6WuxT++Cs8wx2RGidU6MfDfzbja3QiNXp9VXsw3iIfU3Krs1UbmqwGPY tEbTTEx4FeO6augWlojzYz9oy4P4eYRWejqLzNOPfsTbiKtx+MoSMpsiAksu56bMlGK3+Lv4mfhYe bbNkVswMZHlJljdBjozOEj2ITbbI5F6EfjtSY/ZiSq+DJI872x5keNNKtRKwIPRcHNm/RaxTuyMcw 9DWF5OBkvggFiltmkRwUf8c0yhQeHTPHYkLFuSjQTxveqF6EmWC7nTATdylxBFU4s0B0nN8QFsy6P Ty9zkX3gw==; Received: from hch by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1gNZhL-000607-Si; Fri, 16 Nov 2018 08:41:55 +0000 Date: Fri, 16 Nov 2018 00:41:55 -0800 From: Christoph Hellwig To: Jens Axboe Cc: linux-block@vger.kernel.org Subject: Re: [PATCH 05/11] block: add polled wakeup task helper Message-ID: <20181116084155.GG9023@infradead.org> References: <20181115195135.22812-1-axboe@kernel.dk> <20181115195135.22812-6-axboe@kernel.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181115195135.22812-6-axboe@kernel.dk> 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-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Thu, Nov 15, 2018 at 12:51:29PM -0700, Jens Axboe wrote: > If we're polling for IO on a device that doesn't use interrupts, then > IO completion loop (and wake of task) is done by submitting task itself. > If that is the case, then we don't need to enter the wake_up_process() > function, we can simply mark ourselves as TASK_RUNNING. > > Signed-off-by: Jens Axboe Looks fine, Reviewed-by: Christoph Hellwig