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From: Tejun Heo <htejun@gmail.com>
To: maneesh@in.ibm.com
Cc: gregkh@suse.de, dmitry.torokhov@gmail.com,
	cornelia.huck@de.ibm.com, oneukum@suse.de, rpurdie@rpsys.net,
	James.Bottomley@SteelEye.com, stern@rowland.harvard.edu,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCHSET #master] sysfs: make sysfs disconnect immediately on deletion, take 2
Date: Tue, 17 Apr 2007 14:06:31 +0900	[thread overview]
Message-ID: <462455D7.3050908@gmail.com> (raw)
In-Reply-To: <20070416082212.GC31874@in.ibm.com>

Hello, Maneesh.

Maneesh Soni wrote:
> I started looking at these patches and parallely also did some testing on a 
> 8 CPU system. I am using the patches from Greg's tree at
> http://www.kernel.org/pub/scm/linux/kernel/git/gregkh/patches.git/
> 
> I ran following loops parallelly
> 
> # while true; do insmod drivers/net/dummy.ko; sleep 1;rmmod dummy; done
> # while true; do find /sys/class/net/dummy0 | xargs cat; sleep 1; done
> # while true; do umount /sys; sleep 1; mount -t sysfs none /sys; done
> # while true; do find /sys | xargs cat > /dev/null; sleep 1; done
> 
> and got the following oops
> 
> Unable to handle kernel NULL pointer dereference at 000000000000004c RIP:
>  [<ffffffff802935b4>] simple_unlink+0x14/0x5c

Eeek... I'll try to replicate and track down the bug here.  FWIW, SCSI
also oopses if udev is running due to a bug in SCSI open/close handling.

Thanks for testing.

-- 
tejun

  reply	other threads:[~2007-04-17  5:06 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-09  4:18 [PATCHSET #master] sysfs: make sysfs disconnect immediately on deletion, take 2 Tejun Heo
2007-04-09  4:18 ` [PATCH 01/14] sysfs: fix i_ino handling in sysfs Tejun Heo
2007-04-27 15:29   ` Eric Sandeen
2007-04-27 15:32     ` Greg KH
2007-04-27 16:04       ` Eric Sandeen
2007-04-09  4:18 ` [PATCH 02/14] sysfs: fix error handling in binattr write() Tejun Heo
2007-04-09  4:18 ` [PATCH 05/14] sysfs: consolidate sysfs_dirent creation functions Tejun Heo
2007-04-09  4:18 ` [PATCH 03/14] sysfs: move release_sysfs_dirent() to dir.c Tejun Heo
2007-04-09  4:18 ` [PATCH 04/14] sysfs: flatten cleanup paths in sysfs_add_link() and create_dir() Tejun Heo
2007-04-09  4:18 ` [PATCH 07/14] sysfs: add sysfs_dirent->s_name Tejun Heo
2007-04-09  4:18 ` [PATCH 08/14] sysfs: make sysfs_dirent->s_element a union Tejun Heo
2007-04-09  4:18 ` [PATCH 11/14] sysfs: implement bin_buffer Tejun Heo
2007-04-09  4:18 ` [PATCH 06/14] sysfs: add sysfs_dirent->s_parent Tejun Heo
2007-04-09  4:18 ` [PATCH 09/14] sysfs: implement kobj_sysfs_assoc_lock Tejun Heo
2007-04-09  4:18 ` [PATCH 10/14] sysfs: reimplement symlink using sysfs_dirent tree Tejun Heo
2007-04-09  4:18 ` [PATCH 14/14] sysfs: kill unnecessary attribute->owner Tejun Heo
2007-04-10 14:17   ` Cornelia Huck
2007-04-10 14:30     ` Cornelia Huck
2007-04-11  4:21       ` Tejun Heo
2007-04-11  4:25   ` [PATCH 14/14 UPDATED] " Tejun Heo
2007-04-09  4:18 ` [PATCH 13/14] sysfs: kill attribute file orphaning Tejun Heo
2007-04-09  4:18 ` [PATCH 12/14] sysfs: implement sysfs_dirent active reference and immediate disconnect Tejun Heo
2007-04-11  4:15   ` [PATCH 12/14 UPDATED] " Tejun Heo
2007-04-11  9:00     ` Cornelia Huck
2007-04-11  9:26       ` Tejun Heo
2007-04-11  9:32         ` Tejun Heo
2007-04-11 10:13         ` Tejun Heo
2007-04-11 10:26           ` Cornelia Huck
2007-04-12  7:18     ` Greg KH
2007-04-12  7:39       ` Greg KH
2007-04-10 14:44 ` [PATCHSET #master] sysfs: make sysfs disconnect immediately on deletion, take 2 Cornelia Huck
2007-04-11  4:18   ` Tejun Heo
2007-04-16  8:22 ` Maneesh Soni
2007-04-17  5:06   ` Tejun Heo [this message]
2007-04-17 12:42   ` Tejun Heo

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