Date: Thu, 05 Oct 2000 19:34:14 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: cvs-committers@FreeBSD.org Cc: cvs-all@FreeBSD.org Subject: RE: cvs commit: src/sys/alpha/alpha trap.c src/sys/alpha/include Message-ID: <XFMail.001005193414.jhb@FreeBSD.org> In-Reply-To: <200010060220.TAA72199@freefall.freebsd.org>
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On 06-Oct-00 John Baldwin wrote:
> jhb 2000/10/05 19:20:22 PDT
>
> Modified files:
> sys/alpha/alpha trap.c
> sys/alpha/include cpu.h globals.h
> sys/i386/i386 genassym.c globals.s machdep.c
> mp_machdep.c swtch.s trap.c
> sys/i386/include asnames.h cpu.h globaldata.h globals.h
> lock.h mutex.h smptests.h
> sys/i386/isa apic_vector.s clock.c icu_vector.s
> sys/kern kern_clock.c kern_synch.c
> sys/sys proc.h
> Log:
> - Change fast interrupts on x86 to push a full interrupt frame and to
> return through doreti to handle ast's. This is necessary for the
> clock interrupts to work properly.
> - Change the clock interrupts on the x86 to be fast instead of threaded.
> This is needed because both hardclock() and statclock() need to run in
> the context of the current process, not in a separate thread context.
...
This should fix most (if not all) of the micruptime() problems reported after
the SMPng commit. The P_*PEND trick for delaying signal delivery during
hardclock() was an idea that I gleaned from cp, but don't blame him if I
screwed up the implementation or misunderstood him. The changes to make
statclock be fast were almost committed with the original SMPng commit instead
of the prevproc hack, albeit in a slightly different form and were submitted
by jake. Nevertheless, they significantly reduced the work to get statclock
working as most of the code I take straight from jake's patch.
> Submitted by: jakeb (making statclock safe in a fast interrupt)
^^^^^
Grr, should be just 'jake'. IRC nicks != freefall logins. :-P
> Submitted by: cp (concept of delaying signals until ast())
--
John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/
PGP Key: http://www.Baldwin.cx/~john/pgpkey.asc
"Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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