Date: Mon, 25 Jul 2011 18:25:30 +0000 (UTC) From: Marius Strobl <marius@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r224361 - stable/8/sys/sparc64/sparc64 Message-ID: <201107251825.p6PIPUgf069991@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: marius Date: Mon Jul 25 18:25:30 2011 New Revision: 224361 URL: http://svn.freebsd.org/changeset/base/224361 Log: MFC: r223347 As astopgap minimize the sched_lock coverage in pmap_activate() in order to reduce lock contention. Modified: stable/8/sys/sparc64/sparc64/pmap.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) stable/8/sys/geom/label/ (props changed) Modified: stable/8/sys/sparc64/sparc64/pmap.c ============================================================================== --- stable/8/sys/sparc64/sparc64/pmap.c Mon Jul 25 18:25:30 2011 (r224360) +++ stable/8/sys/sparc64/sparc64/pmap.c Mon Jul 25 18:25:30 2011 (r224361) @@ -2136,11 +2136,10 @@ pmap_activate(struct thread *td) struct pmap *pm; int context; + critical_enter(); vm = td->td_proc->p_vmspace; pm = vmspace_pmap(vm); - mtx_lock_spin(&sched_lock); - context = PCPU_GET(tlb_ctx); if (context == PCPU_GET(tlb_ctx_max)) { tlb_flush_user(); @@ -2148,17 +2147,18 @@ pmap_activate(struct thread *td) } PCPU_SET(tlb_ctx, context + 1); + mtx_lock_spin(&sched_lock); pm->pm_context[curcpu] = context; pm->pm_active |= PCPU_GET(cpumask); PCPU_SET(pmap, pm); + mtx_unlock_spin(&sched_lock); stxa(AA_DMMU_TSB, ASI_DMMU, pm->pm_tsb); stxa(AA_IMMU_TSB, ASI_IMMU, pm->pm_tsb); stxa(AA_DMMU_PCXR, ASI_DMMU, (ldxa(AA_DMMU_PCXR, ASI_DMMU) & TLB_CXR_PGSZ_MASK) | context); flush(KERNBASE); - - mtx_unlock_spin(&sched_lock); + critical_exit(); } void
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201107251825.p6PIPUgf069991>