Version: unspecified (using KDE 4.4.5) OS: Linux KDE runs several background tasks that are not related to actions a user might trigger and for whose completion they wait. Still, these tasks can take up considerable resources and thereby even delay other tasks. Notable offenders are http_cache_cleaner and virtuoso. Particularly after login these task can drive the load so high that the system becomes effectively unusable for a couple of minutes. I consider this not just a desirable enhancement, but a downright performance bug. The cure? Setting the IO scheduling priority of these tasks to idle results in a considerable improvement. Reproducible: Didn't try
*** This bug has been marked as a duplicate of bug 183272 ***