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    SubjectRe: [RFC][PATCH 0/3] configfs: Make nested default groups lockdep-friendly
    On Tue, 20 May 2008 18:33:20 +0200
    Louis Rilling <Louis.Rilling@kerlabs.com> wrote:

    > Hi all,
    >
    > The following patches fix lockdep warnings resulting from (correct)
    > recursive locking in configfs.
    >
    > Current lockdep annotations for inode mutexes in configfs are
    > lockdep-friendly provided that:
    > 1/ config_groups have at most one level of default groups (see
    > configfs_attach_group()),
    > 2/ config_groups having default groups are never removed (see
    > configfs_detach_prep()).
    >
    > Since lockdep does not handle such correct recursion, the idea is to
    > insert lockdep_off()/lockdep_on() for inode mutexes as soon as the
    > level of recursion of the I_MUTEX_PARENT -> I_MUTEX_CHILD dependency
    > pattern increases.

    I'm... not entirely happy with such a solution ;(

    there must be a better one.


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