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Date:	Fri, 16 Apr 2010 14:35:26 +0200
From:	Andre Noll <maan@...temlinux.org>
To:	linux-ext4@...r.kernel.org
Cc:	linux-driver@...gic.com, Thomas Helle <Helle@...bingen.mpg.de>
Subject: ext4: (2.6.34-rc4): This should not happen!!  Data will be lost

Hi

I'm seeing the following errors when writing to an ext4 file system:

	qla2xxx 0000:06:09.0: scsi(0:0:0): Abort command issued -- 1 fa6a73 2002.
	end_request: I/O error, dev sda, sector 7812771880
	Aborting journal on device sda-8.
	EXT4-fs (sda): delayed block allocation failed for inode 752 at logical offset 1982464 with max blocks 17588 with error -30

	This should not happen!!  Data will be lost
	EXT4-fs error (device sda) in ext4_da_writepages: Journal has aborted
	EXT4-fs error (device sda): ext4_journal_start_sb: Detected aborted journal
	EXT4-fs (sda): Remounting filesystem read-only
	EXT4-fs (sda): delayed block allocation failed for inode 756 at logical offset 177656 with max blocks 1205 with error -30
	EXT4-fs error (device sda) in ext4_da_write_end: IO failure

	This should not happen!!  Data will be lost
	EXT4-fs (sda): ext4_da_writepages: jbd2_start: 1205 pages, ino 756; err -30

	EXT4-fs (sda): ext4_da_writepages: jbd2_start: 17588 pages, ino 752; err -30

	EXT4-fs (sda): delayed block allocation failed for inode 755 at logical offset 669696 with max blocks 3268 with error -30

	This should not happen!!  Data will be lost
	EXT4-fs (sda): ext4_da_writepages: jbd2_start: 3268 pages, ino 755; err -30

This happened while stress-testing the machine [1] with

	stress -d 5 --hdd-bytes 10G --hdd-noclean

This command is supposed to fill the disk and then exit with "no space
left". Instead, the above errors occured when the fs was 100% full.
There's nothing in the logs of the Raid system.

Is this a known issue? Who's to blame, qla2xxx or ext4?

Thanks
Andre

[1] Vanilla 2.6.34-rc4, a 7.3T ext4 fs on a FC Infortrend hardware
raid, connected to a qlogic hba. Let me know if you need more info.
-- 
The only person who always got his work done by Friday was Robinson Crusoe

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