On Thu, Feb 02, 2012 at 10:59:04PM +0100, Peter Zijlstra wrote: > On Thu, 2012-02-02 at 15:43 -0500, Mikulas Patocka wrote: > > Do you have some measurable use case where the user is removing block > > devices so heavily that this causes a problem? > > Even one can be a problem, we're having people spend lots of time and > effort to reduce machine wide jitter and interference. Adding it with > such disregard isn't cool. > > There's no reason a management cpu adding or removing block devices > should perturb the high-freq trading or industrial laser control running > on the other side of the machine. Very true for real-time applications! For the heavy trading apps, given Frederic's upcoming user-mode-idle work, I can keep this stuff from perturbing the apps. Still, batching would be preferable. Thanx, Paul -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
