lkml.org 
[lkml]   [2008]   [Jan]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Re:Believed resolved: SATA kern-buffRd read slow: based on promise driver bug
Linda Walsh writes:
> Mikael Pettersson wrote:
> > Linda Walsh writes:
> > > Robert Hancock wrote:
> > > > Linda Walsh wrote:
> > > >>>> read rate began falling; at 128k block-reads-at-a-time or larger, it
> > > >>>> drops below 20MB/s (only on buffered SATA).
> > >
> > > But more importantly -- I notice a chronic error message associate
> > > with this drive that may be causing some or all of the problem:
> > > ---
> > > ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2
> > > ata1.00: port_status 0x20080000
> > > ata1.00: cmd c8/00:10:30:06:03/00:00:00:00:00/e0 tag 0 cdb 0x0 data 8192 in
> > > res 50/00:00:3f:06:03/00:00:00:00:00/e0 Emask 0x2 (HSM violation)
> > > ata1: limiting SATA link speed to 1.5 Gbps
> >
> >
> > Looks like the Promise ASIC SG bug. Apply
> > <http://user.it.uu.se/~mikpe/linux/patches/sata_promise/patch-sata_promise-1-asic-sg-bug-fix-v3-2.6.23>
> > and let us know if things improve.
> >
> > /Mikael
> >
> ---
> Yep! Hope that's making it into a patch soon or, at least 2.6.24.
> Kernel buffered

Good to hear that it solved this problem.
The patch is in 2.6.24-rc2 and newer kernels, and will be sent
to -stable for the 2.6.23 and 2.6.22 series.

> I seem to remember reading about some problems with Promise SATA & ACPI.
> Does this address that or is that a separate issue? (Am using no-acpi for

sata_promise does nothing ACPI-related. It doesn't need to.
(Drives may be a different story.)

> Is the above bug mentioned/discussed in the linux-ide archives?

Yes.

> That
> and I'd like to find out why TCQ/NCQ doesn't work with the Seagate drives --

The driver doesn't yet support NCQ.


\
 
 \ /
  Last update: 2008-01-04 12:33    [W:1.506 / U:1.632 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site