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Date: Wed, 2 Nov 2005 13:34:31 +0300 (MSK)
From: Maxim Konovalov <maxim@macomnet.ru>
To: Uwe Doering <gemini@geminix.org>
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Cc: Edwin Groothuis <edwin@mavetju.org>, Igor Sysoev <is@rambler-co.ru>,
	bug-followup@freebsd.org, "Cai,
	Quanqing" <caiquanqing@gmail.com>, freebsd-current@freebsd.org
Subject: Re: kern/67919: Why nobody take serious to fix this bug?
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On Mon, 31 Oct 2005, 16:08+0100, Uwe Doering wrote:

> Maxim Konovalov wrote:
> > [...]
> >
> > > >I was told the patch is incorrect.  It works in certain cases but
> > > >incorrect in general.
> > >
> > >Why is it incorrect ? I'm using it for year.
> >
> > Because you can't just throw away any chunk of data (e.g. it could be
> > a meta-data) without a risk to damage a filesystem.
>
> I wonder, could it really be meta-data?  I was under the impression
> that meta-data is a filesystem property and is therefore dealt with
> in the filesystem code, through i/o buffers.  Isn't the VM pager
> responsible for handling object contents (files etc.), only?  If so,
> it would be unfortunate to throw away pages of data but it certainly
> wouldn't damage the filesystem.

I'm under different (perhaps incorrect) impression.

For the record: ps@ just committed to HEAD a rate limit part of your
patch with a slightly different implementation.

-- 
Maxim Konovalov