linux-kernel - Re: ZRAM 3.10.6 Buffer I/O error

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Message-ID: <20130813043358.GD3101@bbox>
Date:	Tue, 13 Aug 2013 13:33:58 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Thomas Backlund <tmb@...eia.org>,
	Jordi Pujol <jordipujolp@...il.com>, stable@...r.kernel.org,
	Jiang Liu <jiang.liu@...wei.com>, linux-kernel@...r.kernel.org
Subject: Re: ZRAM 3.10.6 Buffer I/O error

Hello Greg,

On Mon, Aug 12, 2013 at 08:58:02PM -0700, Greg Kroah-Hartman wrote:
> On Tue, Aug 13, 2013 at 10:39:00AM +0900, Minchan Kim wrote:
> > Hello,
> > 
> > On Mon, Aug 12, 2013 at 07:39:46PM +0300, Thomas Backlund wrote:
> > > 12.08.2013 17:27, Jordi Pujol skrev:
> > > >Hello,
> > > >
> > > >zram shows an error when mounting a swap partition,
> > > >current version Linux kernel 3.10.6,
> > > >previous versions worked, I suppose that latest zram patches have some
> > > >problem,
> > > >
> > > >machine is an AMD64 dual core, 4GB RAM
> > > >
> > > >+ modprobe -qb zram num_devices=2
> > > >+ echo 104857600 > /sys/block/zram0/disksize
> > > >
> > > ># mkswap /dev/zram0
> > > >Setting up swapspace version 1, size = 102396 KiB
> > > >no label, UUID=6c249930-2ba0-46cf-a8c6-766481942b7d
> > > >
> > > ># pager /var/log/dmesg
> > > >(no more errors shown)
> > > >
> > > ># swapon /dev/zram0
> > > >
> > > ># pager /var/log/dmesg
> > > >...
> > > >[  309.300479] Buffer I/O error on device zram0, logical block 25599
> > > >[  309.300491] Buffer I/O error on device zram0, logical block 25599
> > > >[  309.300514] Buffer I/O error on device zram0, logical block 25599
> > > >[  345.205887] Adding 102396k swap on /dev/zram0.  Priority:-2 extents:1
> > > >across:102396k SSFS
> > > >
> > > >full log files and the kernel source are stored in the address:
> > > >
> > > >http://livenet.selfip.com/ftp/debian/zram_3.10.6_IO_error/
> > > >
> > > 
> > > 
> > > I think this one should fix it and belongs in 3.10 stable too:
> > 
> > Very true. Let's Cc Greg, explicitely.
> 
> -ENOCONTEXT

https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/drivers/staging/zram?id=75c7caf5a052ffd8db3312fa7864ee2d142890c4

It seems you already merge "zram:allow request end to conincide with disksize" to stable.
So there is no concern any more.

Thanks.


-- 
Kind regards,
Minchan Kim
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