linux-kernel - Re: [RFC] zram: support page-based parallel write

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Date:   Thu, 8 Sep 2016 11:31:34 +0900
From:   Minchan Kim <minchan@...nel.org>
To:     Andreas Mohr <andi@...as.de>
CC:     Andrew Morton <akpm@...ux-foundation.org>,
        <linux-kernel@...r.kernel.org>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [RFC] zram: support page-based parallel write

Hello,

On Tue, Sep 06, 2016 at 10:22:20AM +0200, Andreas Mohr wrote:
> On Tue, Sep 06, 2016 at 04:24:17PM +0900, Minchan Kim wrote:
> > @@ -1464,6 +1908,9 @@ static int __init zram_init(void)
> >  		num_devices--;
> >  	}
> >  
> > +	if (create_workers())
> > +		goto out_error;
> > +
> >  	return 0;
> >  
> >  out_error:
> > @@ -1474,6 +1921,7 @@ static int __init zram_init(void)
> >  static void __exit zram_exit(void)
> >  {
> >  	destroy_devices();
> > +	destroy_workers();
> >  }
> 
> 
> Asymmetry --> "BUG".
> 
> ...right?

destory_workers checks workers list so if it's empty, it doesn
nothing. Anyway, I am chaning thread management model now so
it should be changed, too. :)

> 
> (I have to admit that current implementation structure
> is not easy to follow,
> thus I'm not fully sure)
> 
> 
> Thanks for working in this important area!

Thanks for the interest.