netdev - Re: [PATCH 1/2 v5] usbnet: allow status interrupt URB to always be active

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Message-ID: <CACVXFVMxWML6nVNwPLv9RcnVgVNZzUqL8=nf9RaS-KS6Sjqaew@mail.gmail.com>
Date:	Thu, 11 Apr 2013 16:09:16 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	Dan Williams <dcbw@...hat.com>,
	Elina Pasheva <epasheva@...rrawireless.com>,
	Network Development <netdev@...r.kernel.org>,
	linux-usb <linux-usb@...r.kernel.org>,
	Rory Filer <rfiler@...rrawireless.com>,
	Phil Sutter <phil@....cc>
Subject: Re: [PATCH 1/2 v5] usbnet: allow status interrupt URB to always be active

On Thu, Apr 11, 2013 at 2:50 PM, Oliver Neukum <oliver@...kum.org> wrote:
> On Thursday 11 April 2013 10:31:31 Ming Lei wrote:
>
>> 'mem_flags' isn't needed any more since we can apply allocation
>> of GFP_NOIO automatically in resume path now, and you can always
>> use GFP_KERNEL safely. Considered that it is a API, please don't
>> introduce it.
>
> The automatic system goes a long way, but there are corner cases, for example
> work queues, which still need mem_flags.

Could you explain why work queue need GFP_NOIO? and the use case for
usbnet?

Thanks,
-- 
Ming Lei
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