Re: new kernel = megaraid performance cut in half

[Matthew Schumacher <matt.s@aptalaska.net>]

Alan,

FYI,

[root@mail_test root]# uname -a
Linux mail_test 2.4.18-4smp #1 SMP Thu May 2 18:32:34 EDT 2002 i686 unknown
[root@mail_test root]# hdparm -t /dev/sda

/dev/sda:
  Timing buffered disk reads:  64 MB in  1.22 seconds = 52.46 MB/sec
[root@mail_test root]# hdparm -t /dev/sda

So the redhat 2.4.18 kernel reads disk almost 2.5 times better on my 
system.... sounds like something that would be handy in a stable kernel 
release.

Thanks for you help,

schu


Alan Cox wrote:
>>I am running exactly 1g of ram in the machine.  Is there a way to apply 
>>those patches manually or should I get the kernel-2.4.18-4.i686.rpm from 
>>here: http://rhn.redhat.com/errata/RHBA-2002-085.html.
> 
> 
> Your best bet is probably to grab the RH errata kernel. If you get the
> source rpm that also includes the patches for some controllers to do
> I/O from all of memory.
> 
> Hopefully that restores the speed