zram regression fix backport

Minchan Kim minchan at kernel.org
Mon Sep 16 00:04:33 UTC 2013

Hello Luis,

Sorry for late reply.

On Wed, Sep 11, 2013 at 12:52 AM, Luis Henriques
<luis.henriques at canonical.com> wrote:
> Hi,
> It is known that commit 57ab048 ("zram: use zram->lock to protect
> zram_free_page() in swap free notify path") has issues that are fixed
> by commit a0c516c ("zram: don't grab mutex in zram_slot_free_noity").
> Commit 57ab048 made its way to some of the stable kernels (3.2, 3.5,
> 3.8 and 3.10 I believe).  However, the backport of this fix (at least
> to the older kernels) doesn't seem to be trivial -- to bring a0c516c
> into these kernels, requires several other commits to be backported.
> So, unless anyone has strong objections about it, I'm inclined to just
> revert 57ab048 from the 3.5 kernel.

Please, do that.
Now a0c516c had a problem, too so reverting is best choice.

> Cheers,
> --
> Luis

Kind regards,
Minchan Kim

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