Last response from OR 2009. Upstream code fix 2012. -> Invalid
** No longer affects: linux (Ubuntu)
** Project changed: linux => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Importance: High => Undecided
** Changed in: linux (Ubuntu)
Status: Fix Released => New
** Changed in: linux (Ubuntu)
Remote watch: Linux Kernel Bug Tracker #12309 => None
** Changed in: linux (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/336652
Title:
Poor system performance under I/O load
Status in linux package in Ubuntu:
Invalid
Bug description:
This bug seems to particularly affect the Dell Latitude D420, D430 and
(from the kernel.org bug) at least the D830 laptop models; but others
have been reported.
Under I/O load, which need not be excessive - running usb-creator or
even just checking one's email - the system performs remarkably
poorly, far less than other laptop users see. It can often take
minutes to open a window, and sometimes the screen isn't repainted.
Certainly most applications are "dimmed" by Compiz under I/O.
It also appears to massively negatively affect boot performance, with
one core spending its entire time in I/O wait - something we don't see
elsewhere.
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