lkml.org 
[lkml]   [2007]   [Feb]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [git patches] libata ACPI support
Lukas Hejtmanek wrote:
> On Tue, Feb 20, 2007 at 05:23:21PM -0500, Jeff Garzik wrote:
>>> introducing SATA ACPI does not work for me (I've filled the bug
>>> report: http://bugzilla.kernel.org/show_bug.cgi?id=8046) beside those error
>>> messages, IDE performance is decreased. libata.noacpi=1 option works ok but
>>> the performance is still slightly degraded (about 10%).
>> Does performance come back if you also use acpi=off ?
>
> It does not.
>
> With 2.6.20-git15, hdparm -t /dev/sda says 28MB/s,
> with 2.6.20, hdparm -t /dev/sda says 32MB/s.

Can you narrow down the -gitX release further? i.e. does 2.6.20-git13
perform at full speed? -git13 includes several libata changes, but does
not include the ACPI additions.

Since this is an ACPI execution error in the bug, that would tend to
point to bad BIOS tables. But since there is a performance drop that
does not disappear with acpi=off, there might also be another factor,
unrelated to ACPI, at play here.

Jeff



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-02-21 00:51    [W:0.075 / U:0.688 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site