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Date:      Thu, 10 Nov 2005 11:12:29 -0500
From:      Michael Butler <imb@protected-networks.net>
To:        David Taylor <davidt@yadt.co.uk>
Cc:        freebsd-stable@freebsd.org, sos@freebsd.org
Subject:   Re: ATA RAID problem in 6.0-RC1	(ata_alloc_request/ata_raid_init_request)
Message-ID:  <4373716D.6030801@protected-networks.net>
In-Reply-To: <20051110155201.GA35976@outcold.yadt.co.uk>
References:  <20051026163015.GA98346@outcold.yadt.co.uk> <20051110150203.GB35744@outcold.yadt.co.uk> <43736200.6090005@protected-networks.net> <20051110155201.GA35976@outcold.yadt.co.uk>

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David Taylor wrote:
| ar0: 156334MB <Promise Fasttrak RAID1> status: READY
| ar0: disk0 READY (master) using ad6 at ata3-master
| ar0: disk1 READY (mirror) using ad4 at ata2-master

Ok - so the apparent kernel memory leak appears to be associated with
RAID-1. I have RAID-0+1 configured.

To confirm another observation of mine, do you see lots of allocated
memory blocks for the controller?, e.g.

imb@mail:/home/imb> sysctl -a | grep ^ata_
ata_composit:    192,        0,  69703,    117,   406336
ata_request:     200,        0, 139406,     73,  2106449
		(size)	(max.)	(used)	(avail)	(requests)

There appears to be a path through the ar driver which fails to free the
blocks recording the requests ..

	Michael
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