Re: [GIT PULL] libata fixes for v3.13-rc5

From: Alan Stern
Date: Tue Dec 24 2013 - 16:55:52 EST

On Tue, 24 Dec 2013, Tejun Heo wrote:

> Hello, Linus.
> libata fixes for v3.13-rc5. There's one interseting commit - "libata,
> freezer: avoid block device removal while system is frozen". It's an
> ugly hack working around a deadlock condition between driver core
> resume and block layer device removal paths through freezer which was
> made more reproducible by writeback being converted to workqueue some
> releases ago. The bug has nothing to do with libata but it's just an
> workaround which is easy to backport. After discussion, Rafael and I
> seem to agree that we don't really need kernel freezables - both
> kthread and workqueue. There are few specific workqueues which
> constitute PM operations and require freezing, which will be converted
> to use workqueue_set_max_active() instead. All other kernel freezer
> uses are planned to be removed, followed by the removal of kthread and
> workqueue freezer support, hopefully.

Wait a minute. I don't recall anybody mentioning this earlier. What
about khubd? There isn't any plan to remove _it_.

Alan Stern

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