linux-kernel - Re: [patch 12/23] invalidate

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Date:	Fri, 4 Aug 2006 02:04:22 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	gregkh@...e.de, linux-kernel@...r.kernel.org, stable@...nel.org,
	torvalds@...l.org, jmforbes@...uxtx.org, zwane@....linux.org.uk,
	tytso@....edu, rdunlap@...otime.net, davej@...hat.com,
	chuckw@...ntumlinux.com, reviews@...cw.f00f.org,
	alan@...rguk.ukuu.org.uk, jes@...ined-monkey.org, jes@....com
Subject: Re: [patch 12/23] invalidate_bdev() speedup

On Fri, 4 Aug 2006 09:50:13 +0100
Christoph Hellwig <hch@...radead.org> wrote:

> On Thu, Aug 03, 2006 at 10:39:42PM -0700, Greg KH wrote:
> > -stable review patch.  If anyone has any objections, please let us know.
> 
> This is a feature.  Definitly not -stable material.

Apparently that regular IPI storm is causing the SGI machines some
significant problems.  I assume it's the interrupt latency problem again.
Jes would know.

It's not the biggest problem we've ever had, but if this patch is wrong,
the pagecache/buffer_head layer is utterly busted.  And it isn't.

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