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=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 A4EF4C04E87 for ; Tue, 21 May 2019 13:27:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 784A221743 for ; Tue, 21 May 2019 13:27:26 +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="WVQbSLh/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728220AbfEUN1Z (ORCPT ); Tue, 21 May 2019 09:27:25 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:45410 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726995AbfEUN1Z (ORCPT ); Tue, 21 May 2019 09:27:25 -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=yt1TSE+hvjdYVZh8L0V5R+F6bnTH4NU+zMd4kOaAMvQ=; b=WVQbSLh/MDT4P+lDDna9iiMLr RRbMOAsBBmx4mCsZkNt49bylRYvcHzTVyua8N+OHNPIuw3GOInsrr2tiwogTLqP5AK7jQXqd5vN5O FjMt7ysOrVATKhJxwsW8wu+IQw/7kazzkaztdjb/VdxkhrNb2+NFaafvKE6FHHNvmGdLiztCuWzq7 Rn6o/w88n0EJknBygF+sAKOyOMzco10Xo9MPtUSM57FxRbDwkIeLozXg2s6fnIwfuhrOPFLM13NnE BMFnkXKcR7RVT9hjYGA8A55oRboTjDWL+0GercEMTRGgwU8IlWl4Oph/kXhf1JAplB3yExABbnpFX AIZzOg+Ig==; Received: from hch by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1hT4nY-0006Jh-Ty; Tue, 21 May 2019 13:27:20 +0000 Date: Tue, 21 May 2019 06:27:20 -0700 From: Christoph Hellwig To: Oliver Neukum Cc: Christoph Hellwig , Alan Stern , Jaewon Kim , linux-mm@kvack.org, gregkh@linuxfoundation.org, Jaewon Kim , m.szyprowski@samsung.com, ytk.lee@samsung.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Subject: Re: [RFC PATCH] usb: host: xhci: allow __GFP_FS in dma allocation Message-ID: <20190521132720.GA23361@infradead.org> References: <20190520101206.GA9291@infradead.org> <20190520142331.GA12108@infradead.org> <1558428877.12672.8.camel@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1558428877.12672.8.camel@suse.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 Tue, May 21, 2019 at 10:54:37AM +0200, Oliver Neukum wrote: > OK, but this leaves a question open. Will the GFP_NOIO actually > hurt, if it is used after memalloc_noio_save()? Unless we have a bug somewhere it should not make any difference, neither positively nor negatively.