linux-kernel - Re: [PATCH 2/3] ext4: introduce ext4_error_remove

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Message-Id: <1351547256-837-1-git-send-email-n-horiguchi@ah.jp.nec.com>
Date:	Mon, 29 Oct 2012 17:47:36 -0400
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Dave Chinner <david@...morbit.com>,
	Tony Luck <tony.luck@...el.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Andi Kleen <andi.kleen@...el.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jan Kara <jack@...e.cz>,
	"Jun'ichi Nomura" <j-nomura@...jp.nec.com>,
	Akira Fujita <a-fujita@...jp.nec.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 2/3] ext4: introduce ext4_error_remove_page

On Mon, Oct 29, 2012 at 12:07:04PM -0700, Andi Kleen wrote:
> Theodore Ts'o <tytso@....edu> writes:
...
> > Also, if you're going to keep this state in memory, what happens if
> > the inode gets pushed out of memory? 
> 
> You lose the error, just like you do today with any other IO error.
> 
> We had a lot of discussions on this when the memory error handling
> was originally introduced, that was the conclusuion.
> 
> I don't think a special panic knob for this makes sense either.
> We already have multiple panic knobs for memory errors, that
> can be used.

Yes. I understand that adding a new knob is not good.
So this patch uses the existing ext4 knob without adding new one.

Thanks,
Naoya
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