On Sat, Jul 08, 2006 at 05:37:31PM +0200, Pavel Machek wrote:
>
> 2.6.16 needs this. It was merged into 2.6.18-rc1 in
> http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d616e09ab33aa4d013a93c9b393efd5cebf78521 .
>
> pdflush is carefully designed to ensure that all wakeups have some
> corresponding work to do - if a woken-up pdflush thread discovers that
> it hasn't been given any work to do then this is considered an error.
>
> That all broke when swsusp came along - because a timer-delivered
> wakeup to a frozen pdflush thread will just get lost. This causes the
> pdflush thread to get lost as well: the writeback timer is supposed to
> be re-armed by pdflush in process context, but pdflush doesn't execute
> the callout which does this.
>
> Fix that up by ignoring the return value from try_to_freeze(): jsut
> proceed, see if we have any work pending and only go back to sleep if
> that is not the case.
Queued to -stable, thanks.
greg k-h
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