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From: Alan Stern <stern@rowland.harvard.edu>
To: Oliver Neukum <oneukum@suse.com>
Cc: Jaewon Kim <jaewon31.kim@gmail.com>,
	Christoph Hellwig <hch@infradead.org>, <linux-mm@kvack.org>,
	<gregkh@linuxfoundation.org>,
	Jaewon Kim <jaewon31.kim@samsung.com>, <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
Date: Thu, 23 May 2019 10:01:54 -0400 (EDT)	[thread overview]
Message-ID: <Pine.LNX.4.44L0.1905231001100.1553-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <1558558075.2470.2.camel@suse.com>

On Wed, 22 May 2019, Oliver Neukum wrote:

> On Mi, 2019-05-22 at 10:56 -0400, Alan Stern wrote:
> > On Wed, 22 May 2019, Oliver Neukum wrote:
> > 
> > > I agree with the problem, but I fail to see why this issue would be
> > > specific to USB. Shouldn't this be done in the device core layer?
> > 
> > Only for drivers that are on the block-device writeback path.  The 
> > device core doesn't know which drivers these are.
> 
> Neither does USB know. It is very hard to predict or even tell which
> devices are block device drivers. I think we must assume that
> any device may be affected.

All right.  Would you like to submit a patch?

Alan Stern


  reply	other threads:[~2019-05-23 14:01 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-17 16:02 Jaewon Kim
2019-05-17 16:34 ` Matthew Wilcox
2019-05-18  1:53   ` Jaewon Kim
2019-05-20  5:56 ` Christoph Hellwig
2019-05-20  9:09   ` Oliver Neukum
2019-05-20 10:12     ` Christoph Hellwig
2019-05-20 14:16       ` Alan Stern
2019-05-20 14:23         ` Christoph Hellwig
2019-05-21  8:54           ` Oliver Neukum
2019-05-21 13:27             ` Christoph Hellwig
2019-05-21 13:11         ` Oliver Neukum
2019-05-21 14:00           ` Alan Stern
2019-05-22  6:31             ` Oliver Neukum
2019-05-22 14:56               ` Alan Stern
2019-05-22 20:47                 ` Oliver Neukum
2019-05-23 14:01                   ` Alan Stern [this message]
2019-05-28 12:34                     ` Oliver Neukum
2019-05-28 14:25                       ` Alan Stern
2019-05-23 12:32   ` Oliver Neukum
2019-05-23 16:35     ` Christoph Hellwig

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