From: Oliver Neukum <oneukum@suse.com>
To: Alan Stern <stern@rowland.harvard.edu>
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: Wed, 22 May 2019 22:47:55 +0200 [thread overview]
Message-ID: <1558558075.2470.2.camel@suse.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1905221055190.1410-100000@iolanthe.rowland.org>
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.
Regards
Oliver
next prev parent reply other threads:[~2019-05-22 21:01 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-17 16:02 [RFC PATCH] usb: host: xhci: allow __GFP_FS in dma allocation 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 [this message]
2019-05-23 14:01 ` Alan Stern
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1558558075.2470.2.camel@suse.com \
--to=oneukum@suse.com \
--cc=gregkh@linuxfoundation.org \
--cc=hch@infradead.org \
--cc=jaewon31.kim@gmail.com \
--cc=jaewon31.kim@samsung.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-usb@vger.kernel.org \
--cc=m.szyprowski@samsung.com \
--cc=stern@rowland.harvard.edu \
--cc=ytk.lee@samsung.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.