elvtune with 2.6 kernels (under FC3)

elvtune with 2.6 kernels (under FC3)

[Gaspar Bakos]

Hi,

I am cc-ing this to the kernel list, a i have the suspicion that it may
be a kernel related feature.

--------------
I noticed that elvtune does not work on FC3 with a 2.6.12.3
(self-compiled, pristine) kernel. I also tried it with other 2.6.* kernels.

elvtune /dev/sde
ioctl get: Invalid argument

In fact, I get the same message for all disks, either those on a 3ware
controller, or SATA disks directly attached to the motherboard.
The hw is a dual opteron mb with 4Gb RAM.

Did this command become obsoleted?
Is there alternativ?

Cheers
Gaspar

Re: elvtune with 2.6 kernels (under FC3)

[Adrian Bunk]

On Mon, Jul 25, 2005 at 04:31:56PM -0400, Gaspar Bakos wrote:

> Hi,


Hi Gaspar,


> I am cc-ing this to the kernel list, a i have the suspicion that it may
> be a kernel related feature.
> 
> --------------
> I noticed that elvtune does not work on FC3 with a 2.6.12.3
> (self-compiled, pristine) kernel. I also tried it with other 2.6.* kernels.
> 
> elvtune /dev/sde
> ioctl get: Invalid argument
> 
> In fact, I get the same message for all disks, either those on a 3ware
> controller, or SATA disks directly attached to the motherboard.
> The hw is a dual opteron mb with 4Gb RAM.
> 
> Did this command become obsoleted?
> Is there alternativ?


util-linux >= 2.12h gives you a better error message:


# elvtune /dev/hda
ioctl get: Invalid argument

elvtune is only useful on older kernels;
for 2.6 use IO scheduler sysfs tunables instead..
# 


> Cheers
> Gaspar


cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

Re: elvtune with 2.6 kernels (under FC3)

[Bill Davidsen]

Gaspar Bakos wrote:
> Hi,
> 
> I am cc-ing this to the kernel list, a i have the suspicion that it may
> be a kernel related feature.
> 
> --------------
> I noticed that elvtune does not work on FC3 with a 2.6.12.3
> (self-compiled, pristine) kernel. I also tried it with other 2.6.* kernels.
> 
> elvtune /dev/sde
> ioctl get: Invalid argument
> 
> In fact, I get the same message for all disks, either those on a 3ware
> controller, or SATA disks directly attached to the motherboard.
> The hw is a dual opteron mb with 4Gb RAM.
> 
> Did this command become obsoleted?
> Is there alternativ?

Not that I ever found. You can play with values in 
/sys/block/{device}/queue or wherever you have your sysfs mounted.
Not a great user interface, but at least you can play.

-- 
    -bill davidsen (davidsen@tmr.com)
"The secret to procrastination is to put things off until the
  last possible moment - but no longer"  -me