From: Mike Miller <mike.miller@hp.com>
Date: Mon, 4 Aug 2008 09:54:51 +0000 (+0200)
Subject: cciss: make rebuild_lun_table behave better
X-Git-Tag: v2.6.27-rc3~74^2~7
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=a72da29b6cbc5cf918567f2a0d76df6871e94b01;hp=a72da29b6cbc5cf918567f2a0d76df6871e94b01;p=linux-2.6-omap-h63xx.git

cciss: make rebuild_lun_table behave better

This patch makes the rebuild_lun_table smart enough to not rip a logical
volume out from under the OS. Without this fix if a customer is running
hpacucli to monitor their storage the driver will blindly remove and re-add
the disks whenever the utility calls the CCISS_REGNEWD ioctl. Unfortunately,
both hpacucli and ACUXE call the ioctl repeatedly. Customers have reported
IO coming to a standstill. Calling the ioctl is the problem, this patch is
the fix.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cca.cpqcorp.net>
Signed-off-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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