Hi, here is what I have : .ext4 mounted with data=ordered .-tip tree ( uname -a gives : Linux pussy 2.6.36-tip+ ) here is the latencytop & powertop & top screenshot: http://picasaweb.google.com/lh/photo/bMTgbVDoojwUeXtVdyvIKw?feat=directlink the system is/was doing : .dd if=/dev/zero of=test.10g bs=1M count=10000;rm test.10g .netbeans .compiling gcc-4.5.1 .running VBox, which wasn't doing any IO. The guest os was idle in other words .vlc .chromium .firefox and bunch of other small stuff. Even without having running DD, the mouse cursor would occasionally lag. The alt+tab effect in KWin would take 5+seconds to workout. When I run DD on top of the workload it consistently made system much more laggy. The cursor would freeze much more frequent. It is like if you drag your mouse physically, but the cursor on the screen would jump discretely, in other words there is no continuity. Music would stop. I am free to try out anything here. thanks, Aidar On Sat, Oct 30, 2010 at 3:14 PM, Ingo Molnar <mingo@xxxxxxx> wrote: > > * Aidar Kultayev <the.aidar@xxxxxxxxx> wrote: > >> puling the git now - I will try whatever you throw at me. > > Ted, i stuck that patch into tip:out-of-tree as: > > 22fd555f6c5f: <not for upstream> ext4: Relax i_mutex hold times > > So that Aidar can test things more easily via: > > http://people.redhat.com/mingo/tip.git/README > > Thanks, > > Ingo > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href