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usb speed after kernel upgrade [message #39706]

Tue, 25 May 2010 18:15

romeor is currently offline

romeor
Messages: 11
Registered: April 2010

Junior Member

Hi,

i've just made a yum-update and updated kernel to
2.6.18-194.3.1.el5.028stab069.5
which gave me some really nice slowdown to USB 2.0 external drive:
[root@watcher ~]# hdparm -tT /dev/sda

/dev/sda:
Timing cached reads: 1948 MB in 2.00 seconds = 973.75 MB/sec
Timing buffered disk reads: 12 MB in 3.08 seconds = 3.90 MB/sec

so i get back to the
2.6.18-164.15.1.el5.028stab068.9
and got the speed back:
/dev/sda:
Timing cached reads: 1780 MB in 2.00 seconds = 889.09 MB/sec
Timing buffered disk reads: 50 MB in 3.04 seconds = 16.45 MB/sec

what could be problem?

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Re: usb speed after kernel upgrade [message #39709 is a reply to message #39706]

Tue, 25 May 2010 21:40

kir is currently offline

kir
Messages: 1645
Registered: August 2005
Location: Moscow, Russia

Senior Member

Please
(1) file a bug to http://bugzilla.openvz.org/
(2) try to reproduce it with a stock RHEL5 (CentOS5) kernel

Kir Kolyshkin

http://static.openvz.org/userbars/openvz-developer.png

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Re: usb speed after kernel upgrade [message #39712 is a reply to message #39706]

Tue, 25 May 2010 23:05

romeor is currently offline

romeor
Messages: 11
Registered: April 2010

Junior Member

ok, but i don't belive, i've got enough time to reproduce the bug Sad

Sad

sorry.

[Updated on: Tue, 25 May 2010 23:07]

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Re: usb speed after kernel upgrade [message #39715 is a reply to message #39712]

Wed, 26 May 2010 06:06

romeor is currently offline

romeor
Messages: 11
Registered: April 2010

Junior Member

but i can confirm, that if i get back to the latest kernel, i get the same slow down.

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