On 12/10/2016 16:45, Konstantin Belousov wrote: > 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. >> >> Kostik, >> >> could this commit cause a problem reported in the below links? >> https://bz-attachments.freebsd.org/attachment.cgi?id=175614 >> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213371 > > 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.
Sorry for the noise, then. Somehow I thought that this went into the release branch, but obviously there was too little time for that. > The examination must start with backtracing the thread which owns the > smp_ipi_mtx (shown on the screenshot). It looks like DDB is not in GENERIC in 11.0? Not sure if the reporter would be able to configure a dump device and then save the dump given that the panic happens in the installer. If anyone could provide them with instructions that would be great. -- Andriy Gapon _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"