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    SubjectRe: [PATCH] call_usermodehelper hang
    On Wed, Apr 07, 2004 at 05:58:46PM -0500, Brian King wrote:
    > The following patch fixes a deadlock experienced when devices are
    > being added to a bus both from a user process and eventd process.
    > The eventd process was hung waiting on dev->bus->subsys.rwsem which
    > was held by another process, which was hung since it was calling
    > call_usermodehelper directly which was hung waiting for work scheduled
    > on the eventd workqueue to complete. The patch fixes this by delaying
    > the kobject_hotplug work, running it from eventd if possible.

    But why? Will this not still cause the same deadlock eventually? The
    call_usermodehelper function uses keventd, so what about users who call
    that function directly?

    Also, you gratitously changed some of the whitespace in the file you
    were modifying, which isn't a nice thing to do :)


    greg k-h
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