On Fri, Aug 27, 2010 at 09:41:48AM +0800, Minchan Kim wrote:
> Hi, Wu.
>
> On Fri, Aug 27, 2010 at 10:21 AM, Wu Fengguang <fengguang.wu@xxxxxxxxx> wrote:
> > Minchan,
> >
> > It's much cleaner to keep the unchanged congestion_wait() and add a
> > congestion_wait_check() for converting problematic wait sites. The
> > too_many_isolated() wait is merely a protective mechanism, I won't
> > bother to improve it at the cost of more code.
>
> You means following as?
No, I mean do not change the too_many_isolated() related code at all :)
And to use congestion_wait_check() in other places that we can prove
there is a problem that can be rightly fixed by changing to
congestion_wait_check().
> while (unlikely(too_many_isolated(zone, file, sc))) {
> congestion_wait_check(BLK_RW_ASYNC, HZ/10);
>
> /* We are about to die and free our memory. Return now. */
> if (fatal_signal_pending(current))
> return SWAP_CLUSTER_MAX;
> }
Thanks,
Fengguang
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