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Date: Wed, 2 Nov 2005 10:40:17 GMT
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To: freebsd-bugs@FreeBSD.org
From: Maxim Konovalov <maxim@macomnet.ru>
Cc: 
Subject: Re: kern/67919: Why nobody take serious to fix this bug?
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The following reply was made to PR kern/67919; it has been noted by GNATS.

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

 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