linux-ext4 - Re: Strange "rm -fr" issue

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Message-ID: <20131230222229.GA395@x4>
Date:	Mon, 30 Dec 2013 23:22:29 +0100
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: Strange "rm -fr" issue

On 2013.12.30 at 23:17 +0100, Jan Kara wrote:
> On Sun 29-12-13 15:24:06, Markus Trippelsdorf wrote:
> > I came across the following strange issue today:
> > 
> > markus@x4 tmp % rm -fr boost
> > rm: cannot remove ‘boost/results/boost/bin.v2/libs’: Directory not empty
> > markus@x4 tmp % ll boost/results/boost/bin.v2/libs
> > total 68K
> > drwxr-xr-x 17 markus markus 4.0K Dec 29 15:01 .
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:00 ..
> > drwxr-xr-x  4 markus markus 4.0K Dec 29 15:01 move
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 mpl
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 msm
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 multi_array
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 multi_index
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:00 multiprecision
> > drwxr-xr-x  6 markus markus 4.0K Dec 29 15:01 numeric
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 optional
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 parameter
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 phoenix
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 polygon
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 pool
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 python
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 serialization
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 test
> > markus@x4 tmp % ll boost/results/boost/bin.v2/libs
> > total 140K
> > drwxr-xr-x 35 markus markus 4.0K Dec 29 15:01 .
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:00 ..
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 config
> > drwxr-xr-x  4 markus markus 4.0K Dec 29 15:01 move
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 mpl
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 msm
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 multi_array
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 multi_index
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:00 multiprecision
> > drwxr-xr-x  6 markus markus 4.0K Dec 29 15:01 numeric
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 optional
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 parameter
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 phoenix
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 polygon
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 pool
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 predef
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 preprocessor
> > drwxr-xr-x  4 markus markus 4.0K Dec 29 15:01 program_options
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 property_map
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 property_tree
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 proto
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 ptr_container
> > drwxr-xr-x  4 markus markus 4.0K Dec 29 15:01 python
> > drwxr-xr-x  4 markus markus 4.0K Dec 29 15:01 random
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 range
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 ratio
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 rational
> > drwxr-xr-x  5 markus markus 4.0K Dec 29 15:01 regex
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 scope_exit
> > drwxr-xr-x  4 markus markus 4.0K Dec 29 15:01 serialization
> > drwxr-xr-x  4 markus markus 4.0K Dec 29 15:01 signals
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 signals2
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 smart_ptr
> > drwxr-xr-x  4 markus markus 4.0K Dec 29 15:01 spirit
> > drwxr-xr-x  3 markus markus 4.0K Dec 29 15:01 test
> > markus@x4 tmp % rm -fr boost
> > markus@x4 tmp % ll boost/results/boost/bin.v2/libs
> > ls: cannot access boost/results/boost/bin.v2/libs: No such file or directory
> > markus@x4 tmp %
>   Hum, my guess would be that some other process has been adding files to
> the directory while the first 'rm -fr' was running. Thus rm got a list of
> files in 'libs' to delete, deleted them, tried to delete 'libs' and failed
> because the other process has added some new files / dirs in the mean time.
> By the time you run second rm, the creating process has apparently
> finished.

I'm pretty sure that this wasn't the case. The boost test suite had
finished and the machine was idle for a while, before I tried to remove
the directory...

-- 
Markus
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