On Fri, 5 Nov 2010, Jesper Juhl wrote: > On Thu, 28 Oct 2010, Chris Mason wrote: > > > On Thu, Oct 28, 2010 at 03:30:36PM +0200, Ingo Molnar wrote: > > > > > > "Many seconds freezes" and slowdowns wont be fixed via the VFS scalability patches > > > i'm afraid. > > > > > > This has the appearance of some really bad IO or VM latency problem. Unfixed and > > > present in stable kernel versions going from years ago all the way to v2.6.36. > > > > Hmmm, the workload you're describing here has two special parts. First > > it dramatically overloads the disk, and then it has guis doing things > > waiting for the disk. > > > > Just want to chime in with a 'me too'. > > I see something similar on Arch Linux when doing 'pacman -Syyuv' and there > are many (as in more than 5-10) updates to apply. While the update is > running (even if that's all the system is doing) system responsiveness is > terrible - just starting 'chromium' which is usually instant (at least > less than 2 sec at worst) can take upwards of 10 seconds and the mouse > cursor in X starts to jump a bit as well and switching virtual desktops > noticably lags when redrawing the new desktop if there's a full screen app > like gimp or OpenOffice open there. This is on a Lenovo Thinkpad R61i > which has a 'Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz' CPU, 2GB of > memory and 499996 kilobytes of swap. > Forgot to mention the kernel I currently experience this with : [jj@dragon ~]$ uname -a Linux dragon 2.6.35-ARCH #1 SMP PREEMPT Sat Oct 30 21:22:26 CEST 2010 x86_64 Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz GenuineIntel GNU/Linux -- Jesper Juhl <jj@xxxxxxxxxxxxx> http://www.chaosbits.net/ Plain text mails only, please http://www.expita.com/nomime.html Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html -- 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/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>