linux-kernel - Re: [OP] v2.6.22.22-op1

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Date:	Thu, 1 May 2008 16:56:41 +0200
From:	"Oliver Pinter" <oliver.pntr@...il.com>
To:	"Jeff Moyer" <jmoyer@...hat.com>
Cc:	linux-kernel@...r.kernel.org, "Adrian Bunk" <bunk@...nel.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Badari Pulavarty" <pbadari@...ibm.com>,
	"Benjamin LaHaise" <bcrl@...ck.org>,
	"Chris Wright" <chrisw@...s-sol.org>,
	"Davide Libenzi" <davidel@...ilserver.org>,
	"David S. Miller" <davem@...emloft.net>,
	"Grant Grundler" <grundler@...isc-linux.org>,
	"Hugh Dickins" <hugh@...itas.com>,
	"James Morris" <jmorris@...ei.org>, "Jan Kara" <jack@....cz>,
	"Jeff Garzik" <jeff@...zik.org>,
	"Jeff Roberson" <jroberson@...sapeake.net>,
	"Jens Axboe" <jens.axboe@...cle.com>,
	"Johann Felix Soden" <johfel@...rs.sourceforge.net>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Nick Piggin" <npiggin@...e.de>,
	"Patrick McHardy" <kaber@...sh.net>,
	"Robert Love" <rlove@...gle.com>,
	"Stephen Smalley" <sds@...ho.nsa.gov>,
	"Suparna Bhattacharya" <suparna@...ibm.com>,
	"Willy Tarreau" <w@....eu>, "Yan Zheng" <yanzheng@...n.com>,
	"Zach Brown" <zach.brown@...cle.com>
Subject: Re: [OP] v2.6.22.22-op1

Hi Jeff!

thanks, then fixed it

On 5/1/08, Jeff Moyer <jmoyer@...hat.com> wrote:
> <oliver@...ernowsky.hu> writes:
>
> > I announced the v2.6.22.22-op1 "stable" kernel.
>
> >  fs/aio.c                    |   23 ++++++++++++-----------
>
> > Jeff Moyer (1):
> >       aio: account I/O wait time properly
>
> This version of the patch introduced a regression for UML.  It was
> seeing 100% iowait time when it wasn't waiting on any I/O.  There was a
> follow-up patch which did the io_schedule conditionally, see commit id:
>
>   e00ba3dae077f54cfd2af42e939a618caa7a3bca
>
> Cheers,
>
> Jeff
>
> > diff --git a/fs/aio.c b/fs/aio.c
> > index dbe699e..b3419c5 100644
> > --- a/fs/aio.c
> > +++ b/fs/aio.c
> > @@ -1170,7 +1171,7 @@ retry:
> >  			ret = 0;
> >  			if (to.timed_out)	/* Only check after read evt */
> >  				break;
> > -			schedule();
> > +			io_schedule();
> >  			if (signal_pending(tsk)) {
> >  				ret = -EINTR;
> >  				break;
>


-- 
Thanks,
Oliver
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