[Bug 336652] [NEW] Poor system performance under I/O load

[Scott James Remnant]

Public bug reported:

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.

** Affects: linux
     Importance: Unknown
         Status: Unknown

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Bug watch added: Linux Kernel Bug Tracker #12309
   http://bugzilla.kernel.org/show_bug.cgi?id=12309

** Also affects: linux via
   http://bugzilla.kernel.org/show_bug.cgi?id=12309
   Importance: Unknown
       Status: Unknown

-- 
Poor system performance under I/O load
https://bugs.launchpad.net/bugs/336652
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