Date: Thu, 23 Jun 2011 16:21:43 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r223478 - head/sys/ia64/ia64 Message-ID: <201106231621.p5NGLhF2006635@svn.freebsd.org>
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Author: marcel Date: Thu Jun 23 16:21:43 2011 New Revision: 223478 URL: http://svn.freebsd.org/changeset/base/223478 Log: Unblock the outgoing thread after we performed pmap_switch() to switch the region registers. pmap_switch() returns the pmap for which the region register are currently programmed, which needs to be re-programmed on the CPU the ougoing thread gets switched in. This change does not noticibly change anything or fix known bugs, but does give me a warm fuzzy feeling by being more correct. Modified: head/sys/ia64/ia64/machdep.c Modified: head/sys/ia64/ia64/machdep.c ============================================================================== --- head/sys/ia64/ia64/machdep.c Thu Jun 23 15:53:17 2011 (r223477) +++ head/sys/ia64/ia64/machdep.c Thu Jun 23 16:21:43 2011 (r223478) @@ -470,12 +470,12 @@ cpu_switch(struct thread *old, struct th if (PCPU_GET(fpcurthread) == old) old->td_frame->tf_special.psr |= IA64_PSR_DFH; if (!savectx(oldpcb)) { - atomic_store_rel_ptr(&old->td_lock, mtx); - newpcb = new->td_pcb; oldpcb->pcb_current_pmap = pmap_switch(newpcb->pcb_current_pmap); + atomic_store_rel_ptr(&old->td_lock, mtx); + #if defined(SCHED_ULE) && defined(SMP) while (atomic_load_acq_ptr(&new->td_lock) == &blocked_lock) cpu_spinwait();
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