Re: [RFT] major libata update

[Andrew Morton <akpm@osdl.org>]

Jeff Garzik <jeff@garzik.org> wrote:
>
> 
> After much development and review, I merged a massive pile of libata
> patches from Tejun Heo and Albert Lee.  This update contains the
> following major libata
> 
> CHANGES:
> * Rewritten error handling. This is a major piece of work, even
>   though it will be rarely seen.  The new libata EH provides the
>   foundation for not only improved error handling, but also new features
>   such as device hotplug or command queueing. (Tejun Heo)
> 
> * PIO-based I/O is now IRQ-driven by default, rather than polled
>   in a kernel thread.  The polling path will continue to exist for
>   controllers that need it, and other special cases. (Albert Lee)
> 
> * Core support for command queueing (Jens Axboe, Tejun Heo)
> 
> * Support for NCQ-style command queueing (Jens Axboe, Tejun Heo)
> 
> * Increase max-sectors dramatically, for LBA48 devices (Tejun Heo?)
> 
> * Other minor changes, from myself and others.
> 
> IMPACT:
> * If all goes well, this update should improve error handling,
>   solve several outstanding, difficult-to-solve bugs, and provide a good
>   foundation for adding some nifty features in the future.
> 
> TESTING:
> * Although most drivers by count received few operational changes, the
> common probe path was updated, so all drivers need fresh "yes, it sees
> all my disks" regression testing.
> 
> * ahci and sata_sil24 were touched a lot, and so need additional
> testing.
> 
> * sata_sil and ata_piix also need healthy re-testing of all basic
> functionality.

Lots of goodies.

> FEEDBACK:
> * Please CC linux-ide@vger.kernel.org on all emails and bug reports.
> 
> MERGE STATUS:
> * Barring major problems in testing, will submit during 2.6.18 merge window.

I'd be a little concerned with that merge plan at this time - we have a lot
of sata bug reports banked up and afaict a pretty low fixup rate.  Then
again, these patches might fix some of those bugs...

I guess if we can get it all in early (which is only a couple of weeks
away!) and you and Tejun will have time set aside to work on problems then
OK.  But....

http://bugzilla.kernel.org/show_bug.cgi?id=4920
http://bugzilla.kernel.org/show_bug.cgi?id=5533
http://bugzilla.kernel.org/show_bug.cgi?id=5586
http://bugzilla.kernel.org/show_bug.cgi?id=5589
http://bugzilla.kernel.org/show_bug.cgi?id=5798
http://bugzilla.kernel.org/show_bug.cgi?id=5863
http://bugzilla.kernel.org/show_bug.cgi?id=4968
http://bugzilla.kernel.org/show_bug.cgi?id=5047
http://bugzilla.kernel.org/show_bug.cgi?id=5905
http://bugzilla.kernel.org/show_bug.cgi?id=5596
http://bugzilla.kernel.org/show_bug.cgi?id=5654
http://bugzilla.kernel.org/show_bug.cgi?id=5664
http://bugzilla.kernel.org/show_bug.cgi?id=5700
http://bugzilla.kernel.org/show_bug.cgi?id=5709
http://bugzilla.kernel.org/show_bug.cgi?id=5721
http://bugzilla.kernel.org/show_bug.cgi?id=5722
http://bugzilla.kernel.org/show_bug.cgi?id=5922
http://bugzilla.kernel.org/show_bug.cgi?id=5789
http://bugzilla.kernel.org/show_bug.cgi?id=5931
http://bugzilla.kernel.org/show_bug.cgi?id=5969
http://bugzilla.kernel.org/show_bug.cgi?id=5948
http://bugzilla.kernel.org/show_bug.cgi?id=5987
http://bugzilla.kernel.org/show_bug.cgi?id=5995
http://bugzilla.kernel.org/show_bug.cgi?id=6173
http://bugzilla.kernel.org/show_bug.cgi?id=6207
http://bugzilla.kernel.org/show_bug.cgi?id=6240
http://bugzilla.kernel.org/show_bug.cgi?id=6253
http://bugzilla.kernel.org/show_bug.cgi?id=6260
http://bugzilla.kernel.org/show_bug.cgi?id=6272
http://bugzilla.kernel.org/show_bug.cgi?id=6283
http://bugzilla.kernel.org/show_bug.cgi?id=6311
http://bugzilla.kernel.org/show_bug.cgi?id=6317
http://bugzilla.kernel.org/show_bug.cgi?id=6346
http://bugzilla.kernel.org/show_bug.cgi?id=6470
http://bugzilla.kernel.org/show_bug.cgi?id=6056
http://bugzilla.kernel.org/show_bug.cgi?id=6494
http://bugzilla.kernel.org/show_bug.cgi?id=6516
http://bugzilla.kernel.org/show_bug.cgi?id=6521

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