linux-kernel - Re: [RFC PATCH] usb: host: xhci: allow __GFP

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Message-ID: <20190521132720.GA23361@infradead.org>
Date:   Tue, 21 May 2019 06:27:20 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Oliver Neukum <oneukum@...e.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Jaewon Kim <jaewon31.kim@...il.com>, linux-mm@...ck.org,
        gregkh@...uxfoundation.org, Jaewon Kim <jaewon31.kim@...sung.com>,
        m.szyprowski@...sung.com, ytk.lee@...sung.com,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [RFC PATCH] usb: host: xhci: allow __GFP_FS in dma allocation

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.