linux-kernel - Re: 3.10.1: echo repair > sync_action causes hang on RAID-1 (2 x SSD)

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Message-ID: <20130726103549.1e6b0b92@notabene.brown>
Date:	Fri, 26 Jul 2013 10:35:49 +1000
From:	NeilBrown <neilb@...e.de>
To:	"Justin Piszcz" <jpiszcz@...idpixels.com>
Cc:	<linux-kernel@...r.kernel.org>, <linux-raid@...r.kernel.org>
Subject: Re: 3.10.1: echo repair > sync_action causes hang on RAID-1 (2 x
 SSD)

On Thu, 25 Jul 2013 19:10:50 -0400 "Justin Piszcz" <jpiszcz@...idpixels.com>
wrote:

> 
> 
> -----Original Message-----
> From: NeilBrown [mailto:neilb@...e.de] 
> Sent: Sunday, July 21, 2013 7:03 PM
> To: Justin Piszcz
> Cc: linux-kernel@...r.kernel.org; linux-raid@...r.kernel.org
> Subject: Re: 3.10.1: echo repair > sync_action causes hang on RAID-1 (2 x
> SSD)
> 
> > Hi Justin,
> >  this is a known bug.  Fix has been accepted into mainline for 3.11-rc2.
> >  Hopefully it will get into 3.10.3 (too late for 3.10.2).
> 
> > NeilBrown
> 
> 
> Hi Neil,
> 
> Did the fix by chance make it into 3.10.3?

No, it looks like it missed again.  I gather there was a large inflow of
patches for -stable in the 3.11-rc1 merge window and Greg has been processing
them in batches.  Hopefully in 3.10.4.

The relevant patch is commit 30bc9b53878a9921b02e3 in mainline.

NeilBrown



> 
> The same issue occurs with 3.10.3 for me as well:
> 
> Every 1.0s: cat /proc/mdstat                            Thu Jul 25 19:09:46
> 2013
> 
> Personalities : [raid1]
> md1 : active raid1 sdc2[0] sdb2[1]
>       233381376 blocks [2/2] [UU]
>       [>....................]  resync =  0.0% (151488/233381376)
> finish=32045.3m
> in speed=121K/sec
> 
> md0 : active raid1 sdc1[0] sdb1[1]
>       1048512 blocks [2/2] [UU]
> 
> unused devices: <none>
> 
> 
> 
> Justin.


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