linux-kernel - ext3: fix ext3_dx_readdir hash collision handling

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Message-ID: <20081022093201.GA2227@gentoox2.trippelsdorf.de>
Date:	Wed, 22 Oct 2008 11:32:01 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	linux-kernel@...r.kernel.org, eugene@...ix.com, msnitzer@...ix.com,
	tytso@....edu, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org
Subject: ext3: fix ext3_dx_readdir hash collision handling - Regression

Commit 6a897cf447a83c9c3fd1b85a1e525c02d6eada7d 
"ext3: fix ext3_dx_readdir hash collision handling" causes a regression
when deleting big directories.

I'm using an ext3 filesystem in data=writeback mode as my root fs.
When I untar a kernel tarball and then rm -r the files, this is what
happens on my machine (latest git):

markus@...toox2 ~ % tar xjf  linux-2.6.27.2.tar.bz2
markus@...toox2 ~ % rm -r linux-2.6.27.2
rm: cannot remove `linux-2.6.27.2/arch/alpha/include/asm/statfs.h': No such file or directory
rm: cannot remove `linux-2.6.27.2/arch/m68knommu/include/asm/cputime.h': No such file or directory
rm: cannot remove `linux-2.6.27.2/arch/sparc/include/asm/highmem.h': No such file or directory
rm: cannot remove `linux-2.6.27.2/arch/sparc/include/asm/sections_32.h': No such file or directory
rm: cannot remove `linux-2.6.27.2/arch/s390/include/asm/io.h': No such file or directory
rm: cannot remove `linux-2.6.27.2/arch/arm/configs/pcm038_defconfig': No such file or directory
rm: cannot remove `linux-2.6.27.2/arch/powerpc/include/asm/pgtable-ppc32.h': No such file or directory
rm: cannot remove `linux-2.6.27.2/include/asm-um/linkage.h': No such file or directory
rm: cannot remove `linux-2.6.27.2/include/asm-m68k/cachectl.h': No such file or directory
markus@...toox2 ~ % rm -r linux-2.6.27.2
markus@...toox2 ~ % 

After reverting 6a897cf447a83c9c3fd1b85a1e525c02d6eada7d I get the
expected result:

markus@...toox2 ~ % tar xjf  linux-2.6.27.2.tar.bz2
markus@...toox2 ~ % rm -r linux-2.6.27.2
markus@...toox2 ~ % 

-- 
Markus
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