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List:       debian-security
Subject:    Re: Strongest linux - kernel patches
From:       Luis Gomez - InfoEmergencias <lgomez () infoemergencias ! com>
Date:       2003-07-06 13:38:50
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Hi

On Jueves, 3 de Julio de 2003 04:28, Hubert Chan wrote:
> >>>>> "Peter" == Peter Cordes <peter@llama.nslug.ns.ca> writes:
> Peter>  Luckily, that's a solved problem.  Con Kolivas's -ck3 patch for
> Peter> 2.4.21 includes grsecurity and XFS.
>
> There's also wolk, which contains grsecurity, XFS, and a ton of other
> patches.

I'm right now testing Con Kolivas' patches in my workstation, and it seems 
great. I still want to try WOLK in our servers.

However, after having compiled CK's patch with all my usual options 
(activating only support for my motherboard's chipset, etc.), I find an 
annoying thing:

adelita:~# dmesg|grep ST380
hde: ST380023A, ATA DISK drive
hdg: ST380021A, ATA DISK drive

adelita:~# hdparm -d1 /dev/hde /dev/hdg
/dev/hde:
 setting using_dma to 1 (on)
 using_dma    =  1 (on)
/dev/hdg:
 setting using_dma to 1 (on)
 using_dma    =  1 (on)

adelita:~# hdparm -t /dev/hde
/dev/hde:
 Timing buffered disk reads:  64 MB in  2.75 seconds = 23.32 MB/sec

adelita:~# hdparm -t /dev/hdg
/dev/hdg:
 Timing buffered disk reads:  64 MB in  2.04 seconds = 31.37 MB/sec

Both disks are almost identical, the only different is that hde (which btw is 
my / disk) has hdf as slave in the same bus. They always had similar 
throughputs, but hde's seems to have lowered with this kernel patch and I 
cannot get to imagine why.

Anyway I'll keep on testing it. Performance in my workstation seems to be a 
little better, now I'll put hands to work to compile WOLK in the servers :-)

Regards

	Pope

-- 
Luis Gomez Miralles
InfoEmergencias - Technical Department
Phone (+34) 654 24 01 34
Fax (+34) 963 49 31 80
lgomez@infoemergencias.com

PGP Public Key available at http://www.infoemergencias.com/lgomez.asc


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