From: Matthew Dharm <mdharm-kernel@one-eyed-alien.net>
To: David Brownell <david-b@pacbell.net>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Marcelo Tosatti <marcelo.tosatti@cyclades.com.br>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
USB Developers <linux-usb-devel@lists.sourceforge.net>,
Greg KH <greg@kroah.com>
Subject: Re: [linux-usb-devel] Re: USB hangs
Date: Sun, 11 Jan 2004 23:39:05 -0800 [thread overview]
Message-ID: <20040112073905.GA8580@one-eyed-alien.net> (raw)
In-Reply-To: <40021E8E.3010709@pacbell.net>
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On Sun, Jan 11, 2004 at 08:11:58PM -0800, David Brownell wrote:
>
> >>> Plus I'd
> >>>argue PF_MEMALLOC is a better solution anyway.
> >>
> >>It certainly seems like a more comprehensive fix for that
> >>particular class of problems! :)
> >
> >
> >Is it really more comprehensive? As I see it, it will only affect code
> >executed in the context of the usb-storage thread. But, what about code
> >which is invoked in tasklets or other contexts?
>
> Isn't it true that only that thread is allowed to
> submit usb-storage i/o requests?
That's very true.
What I'm concerned about is the downstream effects of a usb_submit_urb() or
the corresponding scatter-gather equivalents.
Matt
--
Matthew Dharm Home: mdharm-usb@one-eyed-alien.net
Maintainer, Linux USB Mass Storage Driver
You should try to see the techs say "three piece suit".
-- The Chief
User Friendly, 11/23/1997
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next prev parent reply other threads:[~2004-01-12 7:39 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-11 0:07 USB hangs Alan Cox
2004-01-11 0:23 ` Matthew Dharm
2004-01-11 0:49 ` [linux-usb-devel] " Oliver Neukum
2004-01-11 1:01 ` Matthew Dharm
2004-01-11 1:06 ` Oliver Neukum
2004-01-11 1:40 ` David Brownell
2004-01-11 2:33 ` Alan Cox
2004-01-11 8:02 ` [linux-usb-devel] " Oliver Neukum
2004-01-11 22:39 ` Alan Cox
2004-01-11 23:29 ` Oliver Neukum
2004-01-12 15:53 ` Alan Stern
2004-01-11 23:25 ` David Brownell
2004-01-11 23:31 ` Matthew Dharm
2004-01-12 4:11 ` David Brownell
2004-01-12 7:39 ` Matthew Dharm [this message]
2004-01-12 8:37 ` Oliver Neukum
2004-01-12 16:27 ` Alan Stern
2004-01-12 20:56 ` Alan Cox
2004-01-16 13:14 ` Pavel Machek
2004-01-11 23:33 ` Oliver Neukum
2004-01-12 0:09 ` Alan Cox
2004-01-12 0:25 ` Matthew Dharm
2004-01-11 18:46 ` Lukas Postupa
2004-01-11 20:04 ` Matthew Dharm
-- strict thread matches above, loose matches on Subject: below --
2004-01-28 16:50 [linux-usb-devel] " Martin Bogomolni
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