linux-kernel - Re: [PATCH 00/23] per device dirty throttling -v8

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Date:	Sun, 5 Aug 2007 16:17:09 +0200
From:	Jörn Engel <joern@...fs.org>
To:	Willy Tarreau <w@....eu>
Cc:	Ingo Molnar <mingo@...e.hu>, Alan Cox <alan@...rguk.ukuu.org.uk>,
	J??rn Engel <joern@...fs.org>, Jeff Garzik <jeff@...zik.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, linux-mm@...ck.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	miklos@...redi.hu, akpm@...ux-foundation.org, neilb@...e.de,
	dgc@....com, tomoki.sekiyama.qu@...achi.com, nikita@...sterfs.com,
	trond.myklebust@....uio.no, yingchao.zhou@...il.com,
	richard@....demon.co.uk, david@...g.hm
Subject: Re: [PATCH 00/23] per device dirty throttling -v8

On Sun, 5 August 2007 10:53:54 +0200, Willy Tarreau wrote:
> On Sun, Aug 05, 2007 at 09:21:41AM +0200, Ingo Molnar wrote:
> > 
> > btw., Mutt does not go boom, i use it myself. It works just fine and 
> > notices new mails even on a noatime,nodiratime filesystem.
> 
> IIRC, atime is used by mailers and by the shell to detect that new
> mail has arrived and report it only once if there are several intances
> watching the same mbox.
> 
> I too use mutt and noatime,nodiratime everywhere (same 10 year-old
> thinko), and the only side effect is that when I have a new mail,
> it is reported in all of my xterms until I read it, clearly something
> I can live with (and sometimes it's even desirable).
> 
> In fact, mutt is pretty good at this. It updates atime and ctime itself
> as soon as it opens the mbox, so the shell is happy and only reports
> "you have mail" afterwards.

For me mutt fails to recognize new mail.  And the difference might be
this:
http://www.google.de/search?q=enable-buffy-size

Jörn

-- 
Fancy algorithms are slow when n is small, and n is usually small.
Fancy algorithms have big constants. Until you know that n is
frequently going to be big, don't get fancy.
-- Rob Pike
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