xfsaild wakeups

xfsaild wakeups

[Elrond]

Hi,

The major issue of xfsaild wakeups was analyzed in
February. (see
http://oss.sgi.com/archives/xfs/2008-02/msg00169.html ).

A small issue persists. We're now at 1 wakeup per second
and mounted filesystem. I have three xfs on my box and the
number wants to grow. xfsaild is on place two of my
powertop wakeup list. Sometimes place one.

Is anyone working on reducing this to zero for an idle fs?


Cheers,


    Elrond

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Re: xfsaild wakeups

[Dave Chinner]

On Tue, Dec 30, 2008 at 12:29:15AM +0100, Elrond wrote:
> 
> Hi,
> 
> The major issue of xfsaild wakeups was analyzed in
> February. (see
> http://oss.sgi.com/archives/xfs/2008-02/msg00169.html ).
> 
> A small issue persists. We're now at 1 wakeup per second
> and mounted filesystem. I have three xfs on my box and the
> number wants to grow. xfsaild is on place two of my
> powertop wakeup list. Sometimes place one.
> 
> Is anyone working on reducing this to zero for an idle fs?

It's on the list of things to do given that 2.6.29 will have
the fix for the bug that the periodic wakeup is catching.

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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Re: xfsaild wakeups

[Elrond]

Hi Dave,

On Wed, Dec 31, 2008 at 10:35:22AM +1100, Dave Chinner wrote:
> On Tue, Dec 30, 2008 at 12:29:15AM +0100, Elrond wrote:
> > 
> > Hi,
> > 
> > The major issue of xfsaild wakeups was analyzed in
> > February. (see
> > http://oss.sgi.com/archives/xfs/2008-02/msg00169.html ).
> > 
> > A small issue persists. We're now at 1 wakeup per second
> > and mounted filesystem. I have three xfs on my box and the
> > number wants to grow. xfsaild is on place two of my
> > powertop wakeup list. Sometimes place one.
> > 
> > Is anyone working on reducing this to zero for an idle fs?
> 
> It's on the list of things to do given that 2.6.29 will have
> the fix for the bug that the periodic wakeup is catching.

So the xfs part is mostly prepared and when 2.6.29 has the
base fix, xfs will follow soon?

Great!


Greetings


    Elrond

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Re: xfsaild wakeups

[Dave Chinner]

On Wed, Dec 31, 2008 at 04:30:50PM +0100, Elrond wrote:
> On Wed, Dec 31, 2008 at 10:35:22AM +1100, Dave Chinner wrote:
> > On Tue, Dec 30, 2008 at 12:29:15AM +0100, Elrond wrote:
> > > 
> > > Hi,
> > > 
> > > The major issue of xfsaild wakeups was analyzed in
> > > February. (see
> > > http://oss.sgi.com/archives/xfs/2008-02/msg00169.html ).
> > > 
> > > A small issue persists. We're now at 1 wakeup per second
> > > and mounted filesystem. I have three xfs on my box and the
> > > number wants to grow. xfsaild is on place two of my
> > > powertop wakeup list. Sometimes place one.
> > > 
> > > Is anyone working on reducing this to zero for an idle fs?
> > 
> > It's on the list of things to do given that 2.6.29 will have
> > the fix for the bug that the periodic wakeup is catching.
> 
> So the xfs part is mostly prepared and when 2.6.29 has the
> base fix, xfs will follow soon?

It's all XFS stuff ;)

What I mean is that the underlying XFS problem that required
the AIL watchdog (the 1s wakeup) is now fixed so we can remove the
periodic wakeup. That removal will probably be in 2.6.30....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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