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SubjectRe: [OP] v2.6.22.22-op1
Date
<oliver@zipernowsky.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;


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