From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Minchan Kim <minchan@kernel.org>,
linux-kernel@vger.kernel.org, Nitin Gupta <ngupta@vflare.org>,
Jerome Marchand <jmarchan@redhat.com>
Subject: Re: [PATCH 1/7] zram: fix race between reset and flushing pending work
Date: Tue, 14 Jan 2014 10:14:39 +0300 [thread overview]
Message-ID: <20140114071439.GC2322@swordfish> (raw)
In-Reply-To: <20140113155527.5731d24ca86f01bfd5ec716f@linux-foundation.org>
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@gmail.com>
-ss
next prev parent reply other threads:[~2014-01-14 7:17 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-13 11:18 [PATCH 0/7] zram bug fix and lock redesign Minchan Kim
2014-01-13 11:18 ` [PATCH 1/7] zram: fix race between reset and flushing pending work Minchan Kim
2014-01-13 23:55 ` Andrew Morton
2014-01-14 0:15 ` Minchan Kim
2014-01-14 7:14 ` Sergey Senozhatsky [this message]
2014-01-13 11:18 ` [PATCH 2/7] zram: delay pending free request in read path Minchan Kim
2014-01-13 11:18 ` [PATCH 3/7] zram: remove unnecessary free Minchan Kim
2014-01-13 11:18 ` [PATCH 4/7] zram: use atomic operation for stat Minchan Kim
2014-01-13 23:58 ` Andrew Morton
2014-01-14 0:19 ` Minchan Kim
2014-01-14 0:23 ` Andrew Morton
2014-01-14 0:38 ` Minchan Kim
2014-01-13 11:19 ` [PATCH 5/7] zram: introduce zram->tb_lock Minchan Kim
2014-01-13 11:19 ` [PATCH 6/7] zram: remove workqueue for freeing removed pending slot Minchan Kim
2014-01-13 19:42 ` Sergey Senozhatsky
2014-01-13 23:38 ` Minchan Kim
2014-01-14 7:09 ` Sergey Senozhatsky
2014-01-13 11:19 ` [PATCH 7/7] zram: remove unnecessary lock Minchan Kim
2014-01-14 9:29 ` Jerome Marchand
2014-01-15 1:34 ` Minchan Kim
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