On 06/25/2012 03:17 AM, Michel Alexandre Salim wrote:
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> On 06/25/2012 04:28 AM, Todd And Margo Chester wrote:
>> On 06/24/2012 06:56 AM, Nico Kadel-Garcia wrote:
>>> On Sun, Jun 24, 2012 at 1:03 AM, Todd And Margo Chester
>>> <[log in to unmask]> wrote:
>>>> Hi All,
>>>>
>>>> SL 6.2 64 bit
>>>>
>>>> Has anyone noticed that their USB 2.0 ports are really, really
>>>> slow?
>>>>
>>>> If I need to copy anything substantial to my USB 2 sticks, I
>>>> boot into Fedora Live 17 Xfce 64 bit CD. Then it goes about 20
>>>> times faster than under SL 6.2.
>>>>
>>>> Anyone have a work around?
>>>>
>>>> Many thanks, -T
>>>
>>> It might help if you mentioned what USB hardware, exactly, you
>>> are using, and what you're doing on it. Flash drives? External
>>> Storage? Do you re-arrange your attached devices when you boot to
>>> Fedora 7?
>>>
>>
>> The stick usually is a Kanguru Flash Blue II (20 MB/s write, 24
>> MB/s read).  But sometimes it is a Verbatim (same speed as the
>> Flash Blue).
>>
> I've experienced this on older Fedora releases as well as openSUSE;
> it's only been recently fixed in upstream kernels (since 3.3) and the
> fix probably hasn't been backported to the RHEL kernels yet (it's
> probably not a priority for enterprise Linux use cases)
>
> http://kernelnewbies.org/Linux_3.3#head-f78554ef663de0fc4d2a82a79bb1fa76e20843dc
>
> "Compaction combined with Transparent Huge Pages can cause significant
> stalls with USB sticks or browser"
>
> Best regards,
>
> - --
> Michel Alexandre Salim
> Fedora Project Contributor: http://fedoraproject.org/

I think you called it.  Thank you!  I will have to hold my
nose until they back port.

-T