linux-kernel - Re: [PATCH v4 0/6] solve deadlock caused by memory allocation with I/O

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Message-Id: <20121106152303.b1e135ee.akpm@linux-foundation.org>
Date:	Tue, 6 Nov 2012 15:23:03 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Ming Lei <ming.lei@...onical.com>
Cc:	linux-kernel@...r.kernel.org,
	Alan Stern <stern@...land.harvard.edu>,
	Oliver Neukum <oneukum@...e.de>,
	Minchan Kim <minchan@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Jens Axboe <axboe@...nel.dk>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-mm@...ck.org, "Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [PATCH v4 0/6] solve deadlock caused by memory allocation with
 I/O

On Sat,  3 Nov 2012 16:35:08 +0800
Ming Lei <ming.lei@...onical.com> wrote:

> This patchset try to solve one deadlock problem which might be caused
> by memory allocation with block I/O during runtime PM and block device
> error handling path. Traditionly, the problem is addressed by passing
> GFP_NOIO statically to mm, but that is not a effective solution, see
> detailed description in patch 1's commit log.

It generally looks OK to me.  I have a few comments and I expect to grab
v5.

Rafael, your thoughts?
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