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

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Message-ID: <20171003201204.GA23521@amd>
Date:   Tue, 3 Oct 2017 22:12:04 +0200
From:   Pavel Machek <pavel@....cz>
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, rjw@...ysocki.net, 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 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?

Can knfsd be a problem?

Can memory management doing background writes be a problem?

Did you do some hibernation testing?

> Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>

Please don't apply this just yet.

									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
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