On 06/25/2012 03:17 AM, Michel Alexandre Salim wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > 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