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Subject: Re: ubifs became broken on contigous power-fails
From: Artem Bityutskiy <dedekind1@gmail.com>
To: pazdnikov@prosoftsystems.ru
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Date: Sat, 12 Jun 2010 17:22:55 +0300
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On Mon, 2010-05-24 at 12:56 +0300, Artem Bityutskiy wrote:
> On Mon, 2010-05-24 at 15:50 +0600, Alexander Pazdnikov wrote:
> > > Could you enable debugging messages when mounging it after power cuts?
> > > The messages generate a lot of noise, so you need to disable them before
> > > starting the real test. The idea is to get UBIFS debugging messages when
> > > errors occur.
> > Sorry, I've hurried up, and after applying your pathes reflash all of the 
> > devices with new firmware.
> > But I'll setup some devices with all firmware to catch this issue again.
> > 
> > > I never had time to really dig this and fix. Would be nice if you could
> > > do this because I will unlikely have time in the nearest future, but I
> > > can help you.
> > Thank you, I'll continue testings and can supply with debug information.
> > 
> > > One think you can do is to make sure you do not fill UBIFS completely,
> > > then you will avoid hitting these budgeting bugs, also known as ENOSPC
> > > issues (I think btrfs uses this terminology).
> > In the issue above there is 11% used space and 89% free space.
> > I've got this issue only when mounting fs in RO and then remounting it in RW.
> 
> OK. Try my patch. Also, it is worth running your tests with UBIFS extra
> self checks enabled.

Did it help?

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)