Date: Fri, 13 Dec 1996 23:05:04 -0800 From: David Greenman <dg@root.com> To: Mike Haertel <haertel@ichips.intel.com> Cc: freebsd-smp@freebsd.org Subject: Re: some questions concerning TLB shootdowns in FreeBSD Message-ID: <199612140705.XAA00954@root.com> In-Reply-To: Your message of "Wed, 11 Dec 1996 15:15:21 PST." <9612112315.AA58904@pdxcs078.intel.com>
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>I'm curious how/when people are doing TLB shootdowns. >Obviously when reducing permission or unmapping pages. >How about for manipulations of the dirty/accessed bits? >(Does FreeBSD use these?) Speaking of the uni-processor case, FreeBSD does the access/modify bit changes in the pmap_changebit() function which does a TLB flush if anything is actually changed. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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