Date: Sun, 12 Oct 1997 18:40:20 -0700 (PDT) From: svincent <svincent@scf-fs.usc.edu> To: freebsd-smp@freebsd.org Cc: Pavlin <pavlin@catarina> Subject: volunteers for SMP coding Message-ID: <Pine.SV4.3.94.971012174147.21287A-100000@aludra.usc.edu>
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Hello,
Pavlin Radoslavov and I (S Vincent) are graduate students at USC, LA.
We have a distributed systems project to do, and were serious and eager
to do some coding for a multiprocessor system.
We looked at the to-do list and were interested in these two things.
Additional run queue management.
* run queue needs restructuring so that there is a per-cpu queue of
runnable tasks. This means that a cpu could access it's own run
queue outside the kernel lock.
* make shared address spaces work.. The VM system needs to know when
the page tables of a "!= curproc" process might be in use on
another cpu (ie: check all other SMPcurproc[]'s). When modifying
the current process it needs to check the vmspace reference count
and do the appropriate IPI's to the other cpu. Locking is a problem
here.
We'd be grateful to have any advice - while we get done with
installing, tests and such things.
S Vincent
Pavlin Radoslavov
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