From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Paolo <paoletto@gmail.com>
Cc: jgarzik@pobox.com, linux-ide@vger.kernel.org
Subject: Re: libata sata_via unusual behaviour
Date: Thu, 1 May 2008 19:58:23 +0100 [thread overview]
Message-ID: <20080501195823.79786815@core> (raw)
In-Reply-To: <3bbeafe90805011158n5b45283awd43a7a534ba11456@mail.gmail.com>
On Thu, 1 May 2008 20:58:37 +0200
Paolo <paoletto@gmail.com> wrote:
> Hello!
>
> It seems that me and many others are experiencing poor sata performances
> in the last months, probably with 2.6.20+ kernels.
>
> an example of these problems is here:
>
> http://ubuntuforums.org/showthread.php?p=4845777
>
> unfortunately it seems that sata subsystem on linux is little to none
> tweakable
It doesn't normally need tweaking, and the hdparm numbers show that it is
working correctly in the example you give. There may be problems higher
up the stack but the ATA layer appears to be doing just fine.
Perhaps the Ubuntu engineers could be persuaded to profile their problem
systems and identify what is causing the slow down - LVM certain has been
problematic for some setups if LVM is in use.
Alan
next prev parent reply other threads:[~2008-05-01 19:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3bbeafe90805011018o28f46794h369242ccb02b7ced@mail.gmail.com>
2008-05-01 18:58 ` libata sata_via unusual behaviour Paolo
2008-05-01 18:58 ` Alan Cox [this message]
2008-05-02 2:40 ` Mark Lord
[not found] ` <3bbeafe90805011216l1780cf5bm9bad77a414062643@mail.gmail.com>
[not found] ` <20080501211019.21b0701d@core>
2008-05-17 13:56 ` Paolo
2008-05-17 14:45 ` Paolo
2008-05-17 22:04 ` Alan Cox
2008-05-18 7:07 ` Paolo
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