linux-kernel - Re: [Bug #13374] reiserfs blocked for more than 120secs

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Message-ID: <4A8AE52F.6030606@t-online.de>
Date:	Tue, 18 Aug 2009 19:30:23 +0200
From:	Harald Dunkel <harald.dunkel@...nline.de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Frédéric Weisbecker <fweisbec@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Jeff Mahoney <jeffm@...e.com>
Subject: Re: [Bug #13374] reiserfs blocked for more than 120secs

Hi Rafael,

I haven't seen the 120secs timeout yet, but using 2.6.31-rc5 there _are_
some delays that I am not sure of. Sometimes it takes about 30 secs till
the XWindow server comes up, for example. (I use xinit on the command line
at login. / and /home are both reiserfs.) For 2.6.30.4 and older I haven't
seen this delay yet, AFAIR.

Most recent event: I tried to format a 4 GByte USB stick with reiserfs.
Here is the screen output:

	# device=/dev/sdf
	# parted $device mklabel gpt
	Warning: The existing disk label on /dev/sdf will be destroyed and
	all data on this disk will be lost. Do you want to continue?
	Yes/No? Yes
	Information: You may need to update /etc/fstab.

	# parted -- $device mkpart primary 0s -1s
	Warning: You requested a partition from 0.00B to 4127MB.
	The closest location we can manage is 17.4kB to 4127MB.
	Is this still acceptable to you?
	Yes/No? Yes
	Information: You may need to update /etc/fstab.

	# mkreiserfs -l usbstick /dev/sdf1
	mkreiserfs 3.6.21 (2009 www.namesys.com)
	:
	:
	UUID: 154d66cc-02ac-4979-9a39-163e3cf80623
	LABEL: usbstick
	ATTENTION: YOU SHOULD REBOOT AFTER FDISK!
	        ALL DATA WILL BE LOST ON '/dev/sdf1'!
	Continue (y/n):y
	Initializing journal - 0%....20%....40%....60%....80%....100%
	Syncing..ok
	ReiserFS is successfully created on /dev/sdf1.

It took about 2 to 3 minutes till the "ok" in the "Syncing" line
was shown. /var/log/messages was silent. When I tried to reproduce
the delay it was gone, of course.

Since I would like to try 2.6.31-rc6 anyway, maybe you could post
some hints about what debugging options to set in the config file?

Many thanx

Harri

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