linux-kernel - Re: [PATCH 1/7] zram: fix race between reset and flushing pending work

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Message-ID: <20140114071439.GC2322@swordfish>
Date:	Tue, 14 Jan 2014 10:14:39 +0300
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Minchan Kim <minchan@...nel.org>, linux-kernel@...r.kernel.org,
	Nitin Gupta <ngupta@...are.org>,
	Jerome Marchand <jmarchan@...hat.com>
Subject: Re: [PATCH 1/7] zram: fix race between reset and flushing pending
 work

On (01/13/14 15:55), Andrew Morton wrote:
[..]
> >
> > --- a/drivers/block/zram/zram_drv.c
> > +++ b/drivers/block/zram/zram_drv.c
> > @@ -553,14 +553,14 @@ static void zram_reset_device(struct zram *zram, bool reset_capacity)
> >  	size_t index;
> >  	struct zram_meta *meta;
> >  
> > -	flush_work(&zram->free_work);
> > -
> >  	down_write(&zram->init_lock);
> >  	if (!zram->init_done) {
> >  		up_write(&zram->init_lock);
> >  		return;
> >  	}
> >  
> > +	flush_work(&zram->free_work);
> > +
> >  	meta = zram->meta;
> >  	zram->init_done = 0;
> 
> This makes zram.lock nest inside zram.init_lock, which afaict is new
> behaviour.
> 
> That all seems OK and logical - has it been well tested with lockdep?
> 

Patches 1-7
Tested-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>

	-ss
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