From: Mark Lord <liml@rtr.ca>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Tejun Heo <htejun@gmail.com>,
jeff@garzik.org, mjg59@srcf.ucam.org, rdunlap@xenotime.net,
trenn@suse.de, forrest.zhao@gmail.com,
kristen.c.accardi@intel.com, lenb@kernel.org,
linux-acpi@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: [PATCHSET] libata: improve ATA ACPI support
Date: Mon, 23 Apr 2007 18:03:31 -0400 [thread overview]
Message-ID: <462D2D33.30403@rtr.ca> (raw)
In-Reply-To: <20070422192500.2e1014fd@the-village.bc.nu>
Alan Cox wrote:
>> * after successfully executing _GTF taskfiles, IDENTIFY page is
>> reloaded
>
> Interesting question we should sort out: What is our identify page as
> supplied to the user meant to be ?
>
> The old IDE one started off as the "identify data at boot" (which is
> useful) and mutated through a million "kind of boot but mangled" and "not
> boot" versions of the identify data, all of which are useless to
> userspace.
>
> Having the "boot" data (for some definition of boot) is important in
> order to know things like the BIOS view of the disk geometry and HPA (eg
> for partitioning), having the current data is useless as its already
> available via SG_IO.
Agreed. Userspace can already fetch the real, current IDENTIFY data
just by issuing the appropriate drive command (except for ATAPI,
since Jeff has gone mute on the months old patch to fix it).
Boot-time IDENTIFY data was extremely useful for IDE development.
It showed how the BIOS had set things up (or not).
Cheers
prev parent reply other threads:[~2007-04-23 22:03 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-22 17:41 [PATCHSET] libata: improve ATA ACPI support Tejun Heo
2007-04-22 17:41 ` [PATCH 01/13] ahci: consolidate common port flags Tejun Heo
2007-04-22 17:49 ` Alan Cox
2007-04-28 18:51 ` Jeff Garzik
2007-04-22 17:41 ` [PATCH 03/13] libata: separate out ata_dev_reread_id() Tejun Heo
2007-04-28 18:53 ` Jeff Garzik
2007-04-29 2:52 ` Tejun Heo
2007-04-22 17:41 ` [PATCH 02/13] libata: separate ATA_EHI_DID_RESET into DID_SOFTRESET and DID_HARDRESET Tejun Heo
2007-04-22 17:50 ` Alan Cox
2007-04-22 17:41 ` [PATCH 10/13] libata-acpi: miscellaneous cleanups Tejun Heo
2007-04-28 19:00 ` Jeff Garzik
2007-04-22 17:41 ` [PATCH 06/13] libata-acpi: clean up parameters and misc stuff Tejun Heo
2007-04-28 18:55 ` Jeff Garzik
2007-04-29 2:54 ` Tejun Heo
2007-04-29 3:12 ` Jeff Garzik
2007-04-22 17:41 ` [PATCH 08/13] libata-acpi: implement ata_acpi_associate() Tejun Heo
2007-04-28 18:59 ` Jeff Garzik
2007-04-22 17:41 ` [PATCH 05/13] libata-acpi: s/CONFIG_SATA_ACPI/CONFIG_ATA_ACPI/ Tejun Heo
2007-04-28 18:54 ` Jeff Garzik
2007-04-22 17:41 ` [PATCH 07/13] libata-acpi: add ATA_FLAG_ACPI_SATA port flag Tejun Heo
2007-04-22 17:53 ` Alan Cox
2007-04-22 18:03 ` Tejun Heo
2007-04-22 18:14 ` Alan Cox
2007-04-23 8:00 ` Tejun Heo
2007-04-22 18:03 ` Alan Cox
2007-04-22 18:09 ` Tejun Heo
2007-04-28 18:58 ` Jeff Garzik
2007-04-29 2:56 ` Tejun Heo
2007-04-22 17:41 ` [PATCH 09/13] libata-acpi: clean up ata_acpi_exec_tfs() Tejun Heo
2007-04-28 19:00 ` Jeff Garzik
2007-04-29 2:56 ` Tejun Heo
2007-04-22 17:41 ` [PATCH 04/13] libata: during revalidation, check n_sectors after device is configured Tejun Heo
2007-04-22 17:41 ` [PATCH 13/13] libata-acpi: implement _GTM/_STM support Tejun Heo
2007-04-22 17:41 ` [PATCH 11/13] libata: reimplement ACPI invocation Tejun Heo
2007-04-28 19:09 ` Jeff Garzik
2007-04-22 17:41 ` [PATCH 12/13] libata-acpi: remove redundant checks Tejun Heo
2007-04-22 18:25 ` [PATCHSET] libata: improve ATA ACPI support Alan Cox
2007-04-23 8:06 ` Tejun Heo
2007-04-23 22:05 ` Mark Lord
2007-04-23 23:03 ` Bartlomiej Zolnierkiewicz
2007-04-23 22:03 ` Mark Lord [this message]
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