From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 20902] New: High
Date: Fri, 22 Oct 2010 08:56:20 GMT
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https://bugzilla.kernel.org/show_bug.cgi?id=20902
Summary: High
Product: File System
Version: 2.5
Kernel Version: 2.6.36-020636rc8-generic
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ext4
AssignedTo: fs_ext4@kernel-bugs.osdl.org
ReportedBy: martinmoerch@gmail.com
Regression: No
I'm running an ext4 filesystem on a LUKS device that sits ontop of an LVM
device. The filesystem is created with no special options and is used for
storing filessizes ranging from 1KB to 20GB.
I experience extremely high IO wait times when trying to write files to the
filesystem, bot locally and through Samba.
The problem can be reproduced by doing a reboot, unlocking with cryptsetup,
mounting the filesystem and then writing a file to any directory on the
filesystem. The 'cp' process stalls for almost 15 minutes and then returns to
normal and completes the copy eventually. If I then 'cp' the same file again,
there's no problem at all and the copy goes through like normal without
stalling for 15 minutes. Rebooting and doing it again, reproduces the problem
immediately.
I've attached anything that might be of interest to anyone who'd want to look
into this.
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