On 06/25/2012 06:17 AM, Michel Alexandre Salim wrote:
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
<[email protected]> 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
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"
I thought I should point out that there is a very simple workaround
documented in the comments section of the link above:
"My workaround is "watch -n 5 sync" when I copy files. Makes the problem
go away completely."
Confirmed this works on my system also.
Previously trying to run livecd-iso-to-disk would take hours and make
the system virtually unusable. After running sync every 5 seconds as
described above the whole thing took just 15 minutes and the system ran
great the whole time.
Jeff
