linux-kernel - Re: udiskd high CPU usage with 4.0 git

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Message-ID: <CAPVoSvTKXPWOu5V6mshdMW0TRE0vtQH2Xj3ydp0bRJt9GiWF3Q@mail.gmail.com>
Date:	Mon, 16 Mar 2015 08:16:39 +0100
From:	Torsten Kaiser <just.for.lkml@...glemail.com>
To:	NeilBrown <neilb@...e.de>
Cc:	Prakash Punnoor <prakash@...noor.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: udiskd high CPU usage with 4.0 git

On Mon, Mar 16, 2015 at 12:44 AM, NeilBrown <neilb@...e.de> wrote:
> On Sat, 14 Mar 2015 21:16:51 +0100 Torsten Kaiser
> <just.for.lkml@...glemail.com> wrote:
>> udisksd now again behaves normal, but I'm not sending this change as a
>> patch, because I do not know about the locking and livetime of these
>> objects to evaluate, if that is really the correct fix.
>
> Thanks for the bisection and analysis!  Always easier when someone else does
> the hard work :-)
>
> There is a much simpler patch (as you probably suspected).  I'll post it in a
> moment.

Linux-4.0-rc4 is still broken as expected, but after applying your
patch from "[PATCH] kernfs: handle poll correctly on 'direct_read'
files" my udisksd process behaves normal again.

Thanks for the quick answer + fix!

Torsten
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