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    SubjectRe: [PATCHSET #master] sysfs: make sysfs disconnect immediately on deletion, take 2
    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
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