Re: swsusp performance problems in 2.6.15-rc3-mm1

[Pavel Machek <pavel@ucw.cz>]

Hi!

> > >  Would that be ok if I made drop_pagecache() nonstatic and called it directly
> > >  from swsusp?
> > 
> > Sure, I'll updates the patch for that.
> 
> Thanks a lot.
>  
> > It changed a bit..  You'll need to run sys_sync() then drop_pagecache()
> > then drop_slab().
> 
> I think it won't hurt if we do this unconditionally in swsusp_shrink_memory().
> Pavel, what do you think?
> 
> The appended patch illustrates the way in which I think we can use this.
> I've tested it a little, but if someone feels like trying it, please
 >  do.

Not sure, do we really want to drop all the pagecache? We want to free
memory that is not going to be used soon after suspend, but I guess
pagecache can be quite "hot".

I'd certainly wait with this until code settles. And at least trying
if it helps or hurts...
								Pavel

-- 
Thanks, Sharp!