On Fri, Sep 16, 2016 at 01:17:14PM +0300, Slawa Olhovchenkov wrote: > On Fri, Sep 16, 2016 at 12:16:17PM +0300, Konstantin Belousov wrote: > > > > > vmspace_switch_aio() allows context switching with old curpmap > > and new proc->p_vmspace. This is a weird condition, where > > curproc->p_vmspace->vm_pmap is not equal to curcpu->pc_curpmap. I do > > not see an obvious place which would immediately break, e.g. even > > for context switch between assignment of newvm to p_vmspace and > > pmap_activate(), the context-switch call to pmap_activate_sw() seems to > > do right thing. > > > > Still, just in case, try this > > > > diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c > > index a23468e..fbaa6c1 100644 > > --- a/sys/vm/vm_map.c > > +++ b/sys/vm/vm_map.c > > @@ -481,6 +481,7 @@ vmspace_switch_aio(struct vmspace *newvm) > > if (oldvm == newvm) > > return; > > > > + critical_enter(); > > /* > > * Point to the new address space and refer to it. > > */ > > @@ -489,6 +490,7 @@ vmspace_switch_aio(struct vmspace *newvm) > > > > /* Activate the new mapping. */ > > pmap_activate(curthread); > > + critical_exit(); > > > > /* Remove the daemon's reference to the old address space. */ > > KASSERT(oldvm->vm_refcnt > 1, > > OK, nginx core dumped, kernel don't crushed. > Now I am try this patch (critical_enter) and reboot.
nginx still core dumped. _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
