linux-kernel - Re: [PATCH] idr: fix idr corruption when id crosses a layer boundary

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Message-ID: <1263591177.14495.7.camel@localhost>
Date:	Fri, 15 Jan 2010 16:32:57 -0500
From:	Eric Paris <eparis@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, miltonm@...tin.ibm.com,
	penberg@...helsinki.fi, bharata@...ux.vnet.ibm.com, jkosina@...e.cz
Subject: Re: [PATCH] idr: fix idr corruption when id crosses a layer
 boundary

On Fri, 2010-01-15 at 13:24 -0800, Andrew Morton wrote:
> On Fri, 15 Jan 2010 16:14:50 -0500
> Eric Paris <eparis@...hat.com> wrote:
> 
> > inotify has for months been been having problems keeping the fsnotify view of
> > its objects in sync with the idr view of its objects.  I discovered this was
> > only ever the case with the 4096th object created.
> 
> Neato.  Do you think this will help with all the inotify problems
> people have been having?

I do believe it should shut up the inotify WARN() people have been
seeing and the memory leak....

> Do you think this fix should go into 2.6.32.x and earlier?

If someone who really understands the idr and can explain the original
test that was there thinks it right I think it should.  It's been broken
and able to produce corruption for a long time.

-Eric

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