Messages in this thread | | | Date | Tue, 17 Apr 2007 14:06:31 +0900 | From | Tejun Heo <> | Subject | Re: [PATCHSET #master] sysfs: make sysfs disconnect immediately on deletion, take 2 |
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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.
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