Date: Sat, 14 Dec 1996 22:45:49 +0100 From: Poul-Henning Kamp <phk@critter.tfs.com> To: Terry Lambert <terry@lambert.org> Cc: dyson@freebsd.org, peter@spinner.dialix.com, smp@freebsd.org, haertel@ichips.intel.com Subject: Re: some questions concerning TLB shootdowns in FreeBSD Message-ID: <8256.850599949@critter.tfs.com> In-Reply-To: Your message of "Sat, 14 Dec 1996 14:12:47 MST." <199612142112.OAA22198@phaeton.artisoft.com>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <199612142112.OAA22198@phaeton.artisoft.com>, Terry Lambert writes: >> The crucial thing, as far as I can see, is to find out >if< we need to >> tell the other CPU's about this change to the pagetables. For a 2cpu >> system the penalty of stopping the other CPU is still within bounds >> of the reasonable, but stopping three CPUs needlessly is not a good idea. >> >> Is there any cheap way to keep a refcount (or bitmap) per vm-object so >> we can see if we need to kick the other CPUs if we fiddle it ? > >Oh, I like this. > >It would make it very easy to have multiple references in the UP case, >as well as the MP case. > >This would let us do device/offset as well as vnode/offset based caching >(for instance, hanging all cache buffers for vnodes on a device off the >device vnode). > >I've wanted this for some time, since I am determined that vclean must >die... > Cool. send patches when done :-) -- Poul-Henning Kamp | phk@FreeBSD.ORG FreeBSD Core-team. http://www.freebsd.org/~phk | phk@login.dknet.dk Private mailbox. whois: [PHK] | phk@tfs.com TRW Financial Systems, Inc. Power and ignorance is a disgusting cocktail.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?8256.850599949>