linux-kernel - Error testing ext3 on brd ramdisk

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Message-ID: <491D7C4C.3090907@nokia.com>
Date:	Fri, 14 Nov 2008 15:25:32 +0200
From:	Adrian Hunter <ext-adrian.hunter@...ia.com>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: Error testing ext3 on brd ramdisk

Hi

I am trying to test EXT3 on a ramdisk and after some number of mounts
(anywhere from 7 to 603 so far), I get errors from e2fsck like this:

/dev/ram0: HTREE directory inode 137 has an invalid root node.
HTREE INDEX CLEARED.
/dev/ram0: Entry 'f1770' in /work/p0/da/d1c61 (137) has deleted/unused inode 692.  CLEARED.
/dev/ram0: Entry 'fa37' in /work/p0/da/d1c61 (137) has deleted/unused inode 799.  CLEARED.
/dev/ram0: Entry 'c1686' in /work/p0/da/d1c61 (137) has deleted/unused inode 470.  CLEARED.
/dev/ram0: Entry 'c19b8' in /work/p0/da/d1c61 (137) has an incorrect filetype (was 3, should be 1).

/dev/ram0: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
       (i.e., without -a or -p options)

This is what I do:

modprobe brd rd_nr=1 rd_size=4096
mkfs.ext3 /dev/ram0
dmesg -n8
i=0
while (true); do
	i=`expr $i + 1`
	echo -------------------------------------------------------------
	echo Cycle $i
	date
	echo Mounting
	sleep 1
	mount -t ext3 /dev/ram0 /mnt/test_file_system || exit 1
	echo Removing old fsstress data
	rm -rf /mnt/test_file_system/work
	mkdir /mnt/test_file_system/work || exit 1
	echo Starting fsstress
	fsstress -d /mnt/test_file_system/work -p 3 -l 0 -n 100000000 &
	echo Sleeping 30 seconds
	sleep 30
	echo Stopping fsstress
	while (ps -e | grep fsstress);do
		pkill fsstress
		sleep 1
	done
	echo Unmounting
	umount /mnt/test_file_system || exit 1
	echo Checking
	sleep 1
	e2fsck -fvp /dev/ram0 || exit 1
done

It seems to happen ever since the introduction of brd (Feb '08).

Does anyone know what is going on?

Regards
Adrian

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