On Wed, Oct 12, 2016 at 04:25:00PM +0300, Andriy Gapon wrote:
> On 04/10/2016 20:01, Konstantin Belousov wrote:
> > Author: kib
> > Date: Tue Oct 4 17:01:24 2016
> > New Revision: 306680
> > URL: https://svnweb.freebsd.org/changeset/base/306680
> > Log:
> > Re-apply r306516 (by cem):
> > Reduce the cost of TLB invalidation on x86 by using per-CPU completion
> > flags
> > Reduce contention during TLB invalidation operations by using a per-CPU
> > completion flag, rather than a single atomically-updated variable.
> could this commit cause a problem reported in the below links?
If I am reading the report right, the problem appears on the
11.0-RELEASE system. The patch you reference was only applied to HEAD a
week ago and was not merged even to stable/11.
The examination must start with backtracing the thread which owns the
smp_ipi_mtx (shown on the screenshot).
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