Date: Sun, 30 Dec 2001 13:47:27 -0800 (PST) From: Julian Elischer <julian@elischer.org> To: Glenn Gombert <glenngombert@onebox.com> Cc: current@freebsd.org Subject: Re: KSE changes available Message-ID: <Pine.BSF.4.21.0112301345220.4442-100000@InterJet.elischer.org> In-Reply-To: <20011224150946.FOOS27009.mta05.onebox.com@onebox.com>
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On Mon, 24 Dec 2001, Glenn Gombert wrote: > > In case anyone is interested I have put a set of patched source code > files from the link below on my FreeBSD Web Page at: > > freebsd.imatowns.com/kse3 > > There are the patched source code files,individual patches (from the > link below) and the un-patched source files in three differnet directories: > > /patched-src > /patches > /unpatched-src > > I have not tried to compile these yet, I just finished getting the source > files patched :) As someone mentionned, the up-to-date KSE tree is available through cvsup10 but I don't know the collection. maybe peter can remind us how to get it. Julian p.s. I'm quite close to needing those syscall stubs :-) (a few days) > > Glenn G. > > > ---- Julian Elischer <julian@elischer.org> wrote: > > The latest round of KSE changes are available from > > > > http://www.freebsd.org/~julian/thediff > > > > These changes represent a work in progress. > > Basically the state is: > > > > GENERIC compiles > > (I don't know yet if it runs but I doubt it.) > > The following changes have been made: > > The 'thread' structure is no longer a built-in part of the proc structure. > > There is an infrastructure to independently crfeate and reap threads. > > The infrastructure is used to create and destroy the 'usual' single > > thread > > associated with each process. It should eventually be used to create > > more > > threads per process.. > > The 'state' variable associated with the process has been raped and > > > > now each thread, and process and KSE has it's own state. > > > > This last part is the bit that is broken because a LOT of the kernel > > doesn't expect the state of a thread to be spread across several > > structures. > > > > For example: > > switch (p->p_stat) { > > case SRUN: > > ... > > case SSTOP: > > .. > > > > has to be completely rewritten because > > SRUN is a per-thread property > > and is accessed as: > > FOREACH_THREAD_IN_PROC(p, td) { > > switch(td->td_state) { > > case TDS_RUNNING: > > case TDS_RUNQ: > > case TDS_SLP: > > ... > > } > > ... > > } > > > > wheras STOP is still a per-process state. > > > > obviously any code that tries to assume the same scope for these tow > > states will break violently in the new code. > > > > I have replaced some of the logic where there seems to be a simple > > answer, > > but there are plenty of places where the answer is not clear. > > > > Such places include signal delivery, > > selection of process (thread?) to deliver a signal to, > > collection of scheduling statistics, > > handling FORK run by one of several threads, > > handling EXIT run by one of several threads, > > handling when the user types ^Z and suspends the process. > > > > If anyone is feeling adventurous they can stat with the code that is > > there > > and start fixing things :-) > > send me patches but let me know ahead of time what you will be doing > > so we don't duplicate, and so I can send you notes on where I'm going > > in > > that part.. > > > > I'll be working on the scheduler for the next few days I think. > > > > Note: if ((p->p_flag & P_KSES) == 0) a process should act exactly as > > it > > does now.. :-) > > > > REGARDS JULIAN > > (bloody capslock key) > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-current" in the body of the message > > > > __________________________________________________ > FREE voicemail, email, and fax...all in one place. > Sign Up Now! http://www.onebox.com > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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