IO slowdown with latest FC4 kernel

[Michael Nischt]

A lot of thanks to Gautam and Manuel

although, there are some strange outputs (see below), performance is now
as usaual :-)

hdparm -Tt /dev/sda1

/dev/sda1:
 Timing cached reads:   2860 MB in  2.00 seconds = 1429.91 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate
ioctl for device
 Timing buffered disk reads:  112 MB in  3.01 seconds =  37.18 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate
ioctl for device


Manuel Pelayo wrote:

>Le dimanche 02 octobre 2005 à 13:13 +0200, Michael Nischt a écrit :
>  
>
>>I've got the same problem, the harddisk in my dell notebook (precision
>>M70) extremly slowed down since the kernel update to 2.6.13-1.1526_FC4 -
>>it became absolutly impossible to work on this computer:
>>
>>/dev/hda:
>> Timing cached reads:   2784 MB in  2.00 seconds = 1391.91 MB/sec
>> Timing buffered disk reads:    6 MB in  3.03 seconds =   1.98 MB/sec
>>
>>Furthermore, I noticed that the harddrive formerly was /dev/sda1 and now
>>is /dev/hda1, which is probably the reason but I don't know how to fix
>>this. I hope there is an easy way, because I'm not that familiar with
>>linux to go into compiling the kernel.
>>    
>>
>
>I've same problem too.
>My notebook is a IBM Thinkpad T43.
>I've solve this when I add 'ide0=noprobe' in the kernel line of
>the /etc/grub.conf file. Here is the diff :
>
>--- grub.conf.old       2005-10-02 16:41:55.000000000 +0200
>+++ grub.conf   2005-10-02 17:17:56.000000000 +0200
>@@ -14,7 +14,7 @@
> password --md5 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
> title Fedora Core (2.6.13-1.1526_FC4)
>        root (hd0,0)
>-       kernel /vmlinuz-2.6.13-1.1526_FC4 ro root=LABEL=/ vga=0x303 rhgb
>quiet
>+       kernel /vmlinuz-2.6.13-1.1526_FC4 ro root=LABEL=/ vga=0x303
>ide0=noprobe rhgb quiet
>        initrd /initrd-2.6.13-1.1526_FC4.img
> title Fedora Core (2.6.12-1.1456_FC4)
>        root (hd0,0)
>
>  
>