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    Subject[PATCH 0/3] kernfs: Introduce separate rwsem to protect inode
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    This change set is consolidating the changes discussed and/or mentioned
    in [1] and [2]. I have not received any feedback about any of the
    patches included in this change set, so I am rebasing them on current
    linux-next tip and bringing them all in one place.

    As mentioned in [1], since changing per-fs kernfs_rwsem into a hashed
    rwsem is not working for all scenarios, PATCH-1 here tries to address
    the same issue with the help of another newly introduced per-fs rwsem.
    PATCH-2 and PATCH-3 are basically resend of PATCH-1 and PATCH-2
    respectively in [2].

    It would be really helpful if I could get some feedback about this
    changeset so that we can reduce the kernfs_rwsem contention and make
    sysfs access more scalable for large-scale systems.

    The patches in this change set are as follows:

    PATCH-1: kernfs: Introduce separate rwsem to protect inode attributes.

    PATCH-2: kernfs: Use a per-fs rwsem to protect per-fs list of
    kernfs_super_info.

    PATCH-3: kernfs: change kernfs_rename_lock into a read-write lock.

    Imran Khan (3):
    kernfs: Introduce separate rwsem to protect inode attributes.
    Use a per-fs rwsem to protect per-fs list of kernfs_super_info.
    kernfs: change kernfs_rename_lock into a read-write lock.

    fs/kernfs/dir.c | 26 +++++++++++++++++---------
    fs/kernfs/file.c | 2 ++
    fs/kernfs/inode.c | 16 ++++++++--------
    fs/kernfs/kernfs-internal.h | 2 ++
    fs/kernfs/mount.c | 8 ++++----
    5 files changed, 33 insertions(+), 21 deletions(-)


    base-commit: 7f7a8831520f12a3cf894b0627641fad33971221

    [1]:https://lore.kernel.org/all/74969b22-e0b6-30bd-a1f0-132f4b8485cf@oracle.com/
    [2]:https://lore.kernel.org/all/20220810111017.2267160-1-imran.f.khan@oracle.com/
    --
    2.34.1

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