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[2607:7c80:54:e::133]) by mx.google.com with ESMTPS id g5si20462573plq.109.2019.05.21.06.27.23 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 21 May 2019 06:27:23 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of batv+dd3a5481af7880b59d64+5749+infradead.org+hch@bombadil.srs.infradead.org designates 2607:7c80:54:e::133 as permitted sender) client-ip=2607:7c80:54:e::133; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20170209 header.b="WVQbSLh/"; spf=pass (google.com: best guess record for domain of batv+dd3a5481af7880b59d64+5749+infradead.org+hch@bombadil.srs.infradead.org designates 2607:7c80:54:e::133 as permitted sender) smtp.mailfrom=BATV+dd3a5481af7880b59d64+5749+infradead.org+hch@bombadil.srs.infradead.org 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 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: 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.