Comment 130 for bug 119730

Hello guys,

some news? performance is still awfull, I don't know what to do. This way,
linux's no more an option.

On Fri, Aug 28, 2009 at 8:25 AM, Kristleifur Daðason
<email address hidden>wrote:

> Hi all,
>
> I was moving disks around on my motherboard because the SATA cables
> blocked a video card. Two disks were placed on a secondary SATA
> controller on the motherboard which I hadn't used before. This has
> caused the slowness to resurface, with the mainline kernel.
>
> Previously, all the disks were on an "82801IR/IO/IH (ICH9R/DO/DH) 6 port
> SATA AHCI Controller", using driver "ahci", capabilities "storage msi pm
> bus_master cap_list emulated", configuration "driver=ahci latency=0
> module=ahci". According to lshw.
>
> In the rearrangement, two disks were placed on a "JMicron 20360/20363
> AHCI Controller", also using driver "ahci", capabilities "storage pm
> pciexpress bus_master cap_list emulated", configuration "driver=ahci
> latency=0 module=ahci".
>
> Before installing mainline, there was both IO and overall system lag
> with the Intel controller. With mainline, the Intel behaves fine, but
> the JMicron turns out to be slow. (To the point where I personally
> consider it broken.)
>
> I hope this info helps!
>
> --
> Slow SATA performance
> https://bugs.launchpad.net/bugs/119730
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>