[dm-devel] [RFC PATCH 0/2] Export lld busy state for request stacking drivers

[Kiyoshi Ueda <k-ueda ct jp nec com>]

Hi Andrew, Jens, James,

The following patches are the revised version to use lld's private data
instead of backing_dev_info.state for exporting lld busy state.

Please review and give me your opinion.
If all of you have no problem, I'll re-send the patches separately
to each maintainer, Jens and James.

The patches are created on the following commit of for-2.6.28
in linux-2.6-block, but the scsi part can be also applied to
scsi-post-merge-2.6.
---------------------------------------------------------------
commit c5062758edbe59286d7d8e718a59e4d4347ef541
Author: Jens Axboe <jens axboe oracle com>
Date:   Wed Sep 24 13:05:10 2008 +0200

    libata: set queue SSD flag for SSD devices
---------------------------------------------------------------


Previous post and discussions about the interface:
    http://lkml.org/lkml/2008/9/19/138


Summary of the patches:
    1/2: block: add lld busy state exporting interface
    2/2: scsi: export busy state via q->lld_busy_fn()

Thanks,
Kiyoshi Ueda