Re: [RFC 5/5] pm: remove kernel thread freezing

From: Pavel Machek <pavel@ucw.cz>
To: "Luis R. Rodriguez" <mcgrof@kernel.org>
Cc: viro@zeniv.linux.org.uk, bart.vanassche@wdc.com,
	ming.lei@redhat.com, tytso@mit.edu, darrick.wong@oracle.com,
	jikos@kernel.org, rjw@rjwysocki.net, len.brown@intel.com,
	linux-fsdevel@vger.kernel.org, boris.ostrovsky@oracle.com,
	jgross@suse.com, todd.e.brandt@linux.intel.com,
	nborisov@suse.com, jack@suse.cz, martin.petersen@oracle.com,
	ONeukum@suse.com, oleksandr@natalenko.name,
	oleg.b.antonyan@gmail.com, linux-pm@vger.kernel.org,
	linux-block@vger.kernel.org, linux-xfs@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [RFC 5/5] pm: remove kernel thread freezing
Date: Fri, 6 Oct 2017 14:07:13 +0200	[thread overview]
Message-ID: <20171006120713.GG9497@amd> (raw)
In-Reply-To: <20171003204940.GA5659@wotan.suse.de>

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On Tue 2017-10-03 22:49:40, Luis R. Rodriguez wrote:
> On Tue, Oct 03, 2017 at 10:12:04PM +0200, Pavel Machek wrote:
> > On Tue 2017-10-03 11:53:13, Luis R. Rodriguez wrote:
> > > Now that all filesystems which used to rely on kthread
> > > freezing have been converted to filesystem freeze/thawing
> > > we can remove the kernel kthread freezer.
> > 
> > Are you surely-sure? You mentioned other in kernel sources of writes;
> > what about those?
> 
> You perhaps did not read the cover letter, it describes this patch will very
> likely take time to *ever* apply. We must cover tons of grounds first, to
> address precisely what you say.

Yeah, I was not careful enough reading cover letter. Having series
where 1-4/5 are ready to go, and 5/5 not-good-idea for years to come
is quite confusing.

Really relevant parts of cover letter should be moved to 5/5 and it
should be clearly marked as "not for application".
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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