linux-kernel - [PATCH 0/2] scsi: export busy state for request stacking drivers

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Message-Id: <20081004.140350.74754456.k-ueda@ct.jp.nec.com>
Date:	Sat, 04 Oct 2008 14:03:50 -0400 (EDT)
From:	Kiyoshi Ueda <k-ueda@...jp.nec.com>
To:	James.Bottomley@...senPartnership.com
Cc:	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	dm-devel@...hat.com, j-nomura@...jp.nec.com, k-ueda@...jp.nec.com
Subject: [PATCH 0/2] scsi: export busy state for request stacking drivers

Hi James,

The following patches export busy-status of SCSI LLD to request-based
dm-multipath for proper I/O scheduling.
The patches are created on the following commit of scsi-post-merge-2.6.
---------------------------------------------------------------
commit 454f40af9f0d4cda1c89e1fc0028d5235b150bc7
Author: Mike Christie <michaelc@...wisc.edu>
Date:   Wed Sep 24 11:46:15 2008 -0500

    libiscsi: fix locking in iscsi_eh_device_reset
---------------------------------------------------------------

The changes from the previous version (*) is to check the busy state
everytime instead of using a cached flag inside scsi.

Summary of the patches:
  1/2: scsi: refactor sdev/starget/shost busy checking
  2/2: scsi: export busy state via q->lld_busy_fn()

Please review and apply.

Thanks,
Kiyoshi Ueda
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