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

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Message-ID: <29004244.0jnB6Wc1z6@aspire.rjw.lan>
Date:   Tue, 03 Oct 2017 23:15:07 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     "Luis R. Rodriguez" <mcgrof@...nel.org>
Cc:     viro@...iv.linux.org.uk, bart.vanassche@....com,
        ming.lei@...hat.com, tytso@....edu, darrick.wong@...cle.com,
        jikos@...nel.org, pavel@....cz, len.brown@...el.com,
        linux-fsdevel@...r.kernel.org, boris.ostrovsky@...cle.com,
        jgross@...e.com, todd.e.brandt@...ux.intel.com, nborisov@...e.com,
        jack@...e.cz, martin.petersen@...cle.com, ONeukum@...e.com,
        oleksandr@...alenko.name, oleg.b.antonyan@...il.com,
        linux-pm@...r.kernel.org, linux-block@...r.kernel.org,
        linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC 5/5] pm: remove kernel thread freezing

On Tuesday, October 3, 2017 8:59:00 PM CEST Rafael J. Wysocki wrote:
> On Tuesday, October 3, 2017 8:53:13 PM CEST 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.
> > 
> > Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>
> 
> I like this one. :-)

However, suspend_freeze/thaw_processes() require some more work.

In particular, the freezing of workqueues is being removed here
without a replacement.

Thanks,
Rafael