On Sat, May 18, 2019 at 11:35:29AM +0300, Dmitry Chagin wrote:
> чт, 16 мая 2019 г. в 16:29, Konstantin Belousov <k...@freebsd.org>:
>
> > Author: kib
> > Date: Thu May 16 13:28:48 2019
> > New Revision: 347695
> > URL: https://svnweb.freebsd.org/changeset/base/347695
> >
> > Log:
> > amd64 pmap: rework delayed invalidation, removing global mutex.
> >
> > For machines having cmpxcgh16b instruction, i.e. everything but very
> > early Athlons, provide lockless implementation of delayed
> > invalidation.
> >
> > The implementation maintains lock-less single-linked list with the
> > trick from the T.L. Harris article about volatile mark of the elements
> > being removed. Double-CAS is used to atomically update both link and
> > generation. New thread starting DI appends itself to the end of the
> > queue, setting the generation to the generation of the last element
> > +1. On DI finish, thread donates its generation to the previous
> > element. The generation of the fake head of the list is the last
> > passed DI generation. Basically, the implementation is a queued
> > spinlock but without spinlock.
> >
> >
>
> Hi, Kostik! First of all thanks for the previous help.
> Second, this commit broke i915kms module. Unfortunatelly,
> I can't give you a lot of information becouse I see only black screen,
> but I can help with testing
Did you recompiled the module ?
_______________________________________________
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"
