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Some temporary fixes to SMP to make it more scheduling and signal friendly.
This is a result of discussions on the mailing lists. Kudos to those who have found the issue and created work-arounds. I have chosen Tor's fix for now, before we can all work the issue more completely. Submitted by: Tor Egge
This commit is contained in:
John Dyson
parent
471176aa5d
commit
cfa5644b2b
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=35977
@ -33,7 +33,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: swtch.s,v 1.70 1998/03/28 11:49:31 dufault Exp $
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* $Id: swtch.s,v 1.71 1998/04/06 15:44:31 peter Exp $
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*/
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#include "npx.h"
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@ -49,6 +49,8 @@
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#include <machine/pmap.h>
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#include <machine/apic.h>
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#include <machine/smptests.h> /** GRAB_LOPRIO */
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#include <machine/ipl.h>
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#include <machine/lock.h>
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#endif /* SMP */
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#include "assym.s"
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@ -308,6 +310,10 @@ _idle:
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*
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* XXX: we had damn well better be sure we had it before doing this!
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*/
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CPL_LOCK /* XXX */
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andl $~SWI_AST_MASK, _ipending /* XXX */
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movl $0, _cpl /* XXX Allow ASTs on other CPU */
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CPL_UNLOCK /* XXX */
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movl $FREE_LOCK, %eax
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movl %eax, _mp_lock
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@ -357,16 +363,20 @@ idle_loop:
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jmp idle_loop
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3:
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#ifdef SMP
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movl $LOPRIO_LEVEL, lapic_tpr /* arbitrate for INTs */
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#endif
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call _get_mplock
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CPL_LOCK /* XXX */
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movl $SWI_AST_MASK, _cpl /* XXX Disallow ASTs on other CPU */
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CPL_UNLOCK /* XXX */
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cmpl $0,_whichrtqs /* real-time queue */
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CROSSJUMP(jne, sw1a, je)
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cmpl $0,_whichqs /* normal queue */
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CROSSJUMP(jne, nortqr, je)
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cmpl $0,_whichidqs /* 'idle' queue */
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CROSSJUMP(jne, idqr, je)
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CPL_LOCK /* XXX */
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movl $0, _cpl /* XXX Allow ASTs on other CPU */
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CPL_UNLOCK /* XXX */
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call _rel_mplock
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jmp idle_loop
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@ -33,7 +33,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: swtch.s,v 1.70 1998/03/28 11:49:31 dufault Exp $
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* $Id: swtch.s,v 1.71 1998/04/06 15:44:31 peter Exp $
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*/
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#include "npx.h"
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@ -49,6 +49,8 @@
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#include <machine/pmap.h>
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#include <machine/apic.h>
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#include <machine/smptests.h> /** GRAB_LOPRIO */
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#include <machine/ipl.h>
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#include <machine/lock.h>
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#endif /* SMP */
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#include "assym.s"
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@ -308,6 +310,10 @@ _idle:
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*
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* XXX: we had damn well better be sure we had it before doing this!
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*/
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CPL_LOCK /* XXX */
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andl $~SWI_AST_MASK, _ipending /* XXX */
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movl $0, _cpl /* XXX Allow ASTs on other CPU */
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CPL_UNLOCK /* XXX */
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movl $FREE_LOCK, %eax
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movl %eax, _mp_lock
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@ -357,16 +363,20 @@ idle_loop:
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jmp idle_loop
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3:
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#ifdef SMP
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movl $LOPRIO_LEVEL, lapic_tpr /* arbitrate for INTs */
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#endif
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call _get_mplock
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CPL_LOCK /* XXX */
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movl $SWI_AST_MASK, _cpl /* XXX Disallow ASTs on other CPU */
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CPL_UNLOCK /* XXX */
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cmpl $0,_whichrtqs /* real-time queue */
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CROSSJUMP(jne, sw1a, je)
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cmpl $0,_whichqs /* normal queue */
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CROSSJUMP(jne, nortqr, je)
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cmpl $0,_whichidqs /* 'idle' queue */
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CROSSJUMP(jne, idqr, je)
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CPL_LOCK /* XXX */
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movl $0, _cpl /* XXX Allow ASTs on other CPU */
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CPL_UNLOCK /* XXX */
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call _rel_mplock
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jmp idle_loop
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@ -33,7 +33,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: swtch.s,v 1.70 1998/03/28 11:49:31 dufault Exp $
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* $Id: swtch.s,v 1.71 1998/04/06 15:44:31 peter Exp $
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*/
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#include "npx.h"
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@ -49,6 +49,8 @@
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#include <machine/pmap.h>
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#include <machine/apic.h>
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#include <machine/smptests.h> /** GRAB_LOPRIO */
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#include <machine/ipl.h>
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#include <machine/lock.h>
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#endif /* SMP */
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#include "assym.s"
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@ -308,6 +310,10 @@ _idle:
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*
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* XXX: we had damn well better be sure we had it before doing this!
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*/
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CPL_LOCK /* XXX */
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andl $~SWI_AST_MASK, _ipending /* XXX */
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movl $0, _cpl /* XXX Allow ASTs on other CPU */
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CPL_UNLOCK /* XXX */
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movl $FREE_LOCK, %eax
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movl %eax, _mp_lock
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@ -357,16 +363,20 @@ idle_loop:
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jmp idle_loop
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3:
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#ifdef SMP
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movl $LOPRIO_LEVEL, lapic_tpr /* arbitrate for INTs */
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#endif
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call _get_mplock
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CPL_LOCK /* XXX */
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movl $SWI_AST_MASK, _cpl /* XXX Disallow ASTs on other CPU */
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CPL_UNLOCK /* XXX */
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cmpl $0,_whichrtqs /* real-time queue */
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CROSSJUMP(jne, sw1a, je)
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cmpl $0,_whichqs /* normal queue */
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CROSSJUMP(jne, nortqr, je)
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cmpl $0,_whichidqs /* 'idle' queue */
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CROSSJUMP(jne, idqr, je)
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CPL_LOCK /* XXX */
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movl $0, _cpl /* XXX Allow ASTs on other CPU */
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CPL_UNLOCK /* XXX */
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call _rel_mplock
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jmp idle_loop
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