On Fri, 11 Nov 2016, Peter Zijlstra wrote:

On Fri, Nov 11, 2016 at 12:46:37PM -0600, Christoph Lameter wrote:

quoted

On Thu, 10 Nov 2016, Daniel Vacek wrote:

quoted

I believe Daniel's patches are the best thing we can do in current
situation as the behavior now seems rather buggy and does not provide above
mentioned expectations set when rt throttling was merged with default
budget of 95% of CPU time. Nor if you configure so that it does (by
disabling RT_RUNTIME_SHARE), it also forces CPUs to go idle needlessly when
there still can be rt task running not really starving anyone. At least
till a proper rework of rt scheduling with DL Server is implemented.

This looks like a fix for a bug and the company I work for is suffering
as a result. Could we please merge that ASAP?

What bug? And no, the patch has as many technical issues as it has
conceptual ones.

There is a deadlock, Peter!!!