From: Jeff Garzik <jeff@garzik.org>
To: Tejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org, jens.axboe@oracle.com,
linux-scsi@vger.kernel.org, James.Bottomley@suse.de,
linux-kernel@vger.kernel.org, ben@decadent.org.uk,
davem@davemloft.net, bzolnier@gmail.com
Subject: Re: [PATCH 8/8] libata: implement on-demand HPA unlocking
Date: Sat, 15 May 2010 15:22:29 -0400 [thread overview]
Message-ID: <4BEEF475.5000501@garzik.org> (raw)
In-Reply-To: <1273946974-29131-9-git-send-email-tj@kernel.org>
On 05/15/2010 02:09 PM, Tejun Heo wrote:
> Implement ata_scsi_unlock_native_capacity() which will be called
> through SCSI layer when block layer notices that partitions on a
> device extend beyond the end of the device. It requests EH to unlock
> HPA, waits for completion and returns the current device capacity.
>
> This allows libata to unlock HPA on demand instead of having to decide
> whether to unlock upfront. Unlocking on demand is safer than
> unlocking by upfront because some BIOSes write private data to the
> area beyond HPA limit. This was suggested by Ben Hutchings.
>
> Signed-off-by: Tejun Heo<tj@kernel.org>
> Suggested-by: Ben Hutchings<ben@decadent.org.uk>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
next prev parent reply other threads:[~2010-05-15 19:22 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-15 18:09 [PATCHSET] block,libata: implement ->unlock_native_capacity() Tejun Heo
2010-05-15 18:09 ` [PATCH 1/8] buffer: make invalidate_bdev() drain all percpu LRU add caches Tejun Heo
2010-05-16 7:11 ` David Miller
2010-05-15 18:09 ` [PATCH 2/8] block: restart partition scan after resizing a device Tejun Heo
2010-05-16 7:15 ` David Miller
2010-05-15 18:09 ` [PATCH 3/8] block,ide: simplify bdops->set_capacity() to ->unlock_native_capacity() Tejun Heo
2010-05-15 18:48 ` Bartlomiej Zolnierkiewicz
2010-05-15 18:58 ` Tejun Heo
2010-05-16 7:15 ` David Miller
2010-05-15 18:09 ` [PATCH 4/8] block: use struct parsed_partitions *state universally in partition check code Tejun Heo
2010-05-16 7:16 ` David Miller
2010-05-15 18:09 ` [PATCH 5/8] block: improve automatic native capacity unlocking Tejun Heo
2010-05-16 7:17 ` David Miller
2010-05-15 18:09 ` [PATCH 6/8] SCSI: implement sd_unlock_native_capacity() Tejun Heo
2010-05-16 7:18 ` David Miller
2010-05-16 13:39 ` James Bottomley
2010-05-16 15:07 ` Ben Hutchings
2010-05-16 16:00 ` James Bottomley
2010-05-16 17:00 ` Tejun Heo
2010-05-16 19:23 ` James Bottomley
2010-05-17 5:30 ` Tejun Heo
2010-06-02 17:50 ` Jeff Garzik
2010-05-15 18:09 ` [PATCH 7/8] libata: use the enlarged capacity after late HPA unlock Tejun Heo
2010-05-15 19:22 ` Jeff Garzik
2010-05-16 7:18 ` David Miller
2010-05-15 18:09 ` [PATCH 8/8] libata: implement on-demand HPA unlocking Tejun Heo
2010-05-15 19:22 ` Jeff Garzik [this message]
2010-05-16 7:19 ` David Miller
2010-05-19 7:05 ` [PATCHSET] block,libata: implement ->unlock_native_capacity() Tejun Heo
2010-05-19 7:08 ` Jens Axboe
2010-06-02 16:37 ` Tejun Heo
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