Re: [PROPOSAL] 2.4.27 as default 2.4 kernel for sarge

[Sven Luther <sven.luther@wanadoo.fr>]

On Sat, Aug 28, 2004 at 04:01:35PM +0800, John Summerfield wrote:
> John Summerfield wrote:
> 
> >Sven Luther wrote:
> >
> >>>fwiw I noticed something very like this between 2.2 and 2.4 when 2.4 
> >>>was new: 2.2 was faster on my Pentium system. I think it was a 
> >>>earlier version of the same chipset.
> >>>
> >>>Here are results on 2.6.7-1-k7:
> >>>/dev/hda:
> >>>Timing buffered disk reads:  108 MB in  3.02 seconds =  35.78 MB/sec
> >>>
> >>>/dev/hdg:
> >>>Timing buffered disk reads:  120 MB in  3.01 seconds =  39.93 MB/sec
> >>>kowari:/etc#
> >>>
> >>>Both drives are WD120 Gb (different models), hdg is on an Abit 
> >>>hotrod66 (promise chips).
> >>>  
> >>
> >>
> >>And how much you would get in 2.4 ?
> >> 
> >>
> >Sorry.
> >
> >kowari:~# hdparm -t /dev/hd{a,g}{,}
> >
> >/dev/hda:
> >Timing buffered disk reads:  152 MB in  3.02 seconds =  50.33 MB/sec
> >/dev/hda:
> >Timing buffered disk reads:  152 MB in  3.02 seconds =  50.33 MB/sec
> >
> >/dev/hdg:
> >Timing buffered disk reads:  120 MB in  3.02 seconds =  39.74 MB/sec
> >
> >/dev/hdg:  Timing buffered disk reads:  120 MB in  3.00 seconds =  
> >40.00 MB/sec
> >kowari:~# uname -r
> >2.4.26-1-k7
> >kowari:~#
> 
> 
> I have further results, and I've just filed a bug report (confirmation 
> not in yet so no no).
> kowari:~# hdparm -t /dev/hd{a,g}{,}
> 
> /dev/hda:
> Timing buffered disk reads:  112 MB in  3.05 seconds =  36.73 MB/sec
> 
> /dev/hda:
> Timing buffered disk reads:  110 MB in  3.00 seconds =  36.64 MB/sec
> 
> /dev/hdg:
> Timing buffered disk reads:  118 MB in  3.01 seconds =  39.21 MB/sec
> 
> /dev/hdg:
> Timing buffered disk reads:  120 MB in  3.01 seconds =  39.83 MB/sec
> kowari:~# uname -r
> 2.6.8-1-k7
> kowari:~#
> 
> 
> It's a self-built kernel, but without modification.
> 
> I neglected to include a modules listing in the bug report. Here are 
> those myst likely to be involved:
> ide_generic             1472  0
> sis5513                16776  1
> hpt366                 22788  2
> ide_disk               19264  5 hpt366
> ide_core              138776  5 
> usb_storage,ide_generic,sis5513,hpt366,ide_disk
> sd_mod                 21632  0
> ata_piix                8132  0
> libata                 41348  1 ata_piix
> scsi_mod              124620  3 usb_storage,sd_mod,libata
> unix                   28592  170

I wonder if your ide chipset got correctly detected (aparently), and if dma
and other such parameters are identic.

Also, i suppose that this may be the result of the libataization of said
driver, could that be possible ? 

Friendly,

Sven Luther