Date: Fri, 2 Apr 1999 12:41:53 -0600 From: Alan Cox <alc@cs.rice.edu> To: current@freebsd.org Cc: luoqi@freebsd.org Subject: SMP users (important) Message-ID: <19990402124153.H14114@nonpc.cs.rice.edu>
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I've committed the basic infrastructure to improve TLB management
on SMPs. Translation: this will lead to the elimination of a LOT
of interprocessor interrupts to invalidate TLB entries. I'll be
"turning on" the new mechanisms slowly so we can carefully debug
each step and (hopefully) avoid any problems.
Now, if you're not using Luoqi's patches to enable multithreaded
address spaces, you can stop reading here. If you are, you'll
need to patch i386/i386/swtch.s as follows:
Index: i386/i386/swtch.s
===================================================================
RCS file: /home/ncvs/src/sys/i386/i386/swtch.s,v
retrieving revision 1.78
diff -c -r1.78 swtch.s
*** swtch.s 1999/04/02 17:59:39 1.78
--- swtch.s 1999/04/02 18:37:29
***************
*** 466,472 ****
#else
xorl %eax, %eax
#endif /* SMP */
! btrl %eax, VM_PMAP+PM_ACTIVE(%edx)
movl P_ADDR(%ecx),%edx
--- 466,473 ----
#else
xorl %eax, %eax
#endif /* SMP */
! movl VM_PMAP(%edx), %edx
! btrl %eax, PM_ACTIVE(%edx)
movl P_ADDR(%ecx),%edx
***************
*** 690,696 ****
#else
xorl %eax, %eax
#endif
! btsl %eax, VM_PMAP+PM_ACTIVE(%ebx)
/* restore context */
movl PCB_EBX(%edx),%ebx
--- 691,698 ----
#else
xorl %eax, %eax
#endif
! movl VM_PMAP(%ebx), %ebx
! btsl %eax, PM_ACTIVE(%ebx)
/* restore context */
movl PCB_EBX(%edx),%ebx
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