Date: Mon, 15 Mar 2004 14:21:39 -0500 From: Ken Smith <kensmith@cse.Buffalo.EDU> To: Wilko Bulte <wkb@freebie.xs4all.nl> Cc: John Baldwin <jhb@FreeBSD.org> Subject: Re: cvs commit: src/sys/kern sys_process.c syscalls.master Message-ID: <20040315192139.GB28070@electra.cse.Buffalo.EDU> In-Reply-To: <20040315190853.GA33607@freebie.xs4all.nl> References: <200403151848.i2FImSFe047106@repoman.freebsd.org> <20040315190853.GA33607@freebie.xs4all.nl>
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On Mon, Mar 15, 2004 at 08:08:53PM +0100, Wilko Bulte wrote:
> On Mon, Mar 15, 2004 at 10:48:28AM -0800, John Baldwin wrote:
> > jhb 2004/03/15 10:48:28 PST
> >
> > FreeBSD src repository
> >
> > Modified files:
> > sys/kern sys_process.c syscalls.master
> > Log:
> > Drop the proc lock around calls to the MD functions ptrace_single_step(),
> > ptrace_set_pc(), and cpu_ptrace() so that those functions are free to
> > acquire Giant, sleep, etc. We already do a PHOLD/PRELE around them so
> > that it is safe to sleep inside of these routines if necessary. This
> > allows ptrace() to be marked MP safe again as it no longer triggers lock
> > order reversals on Alpha.
>
> Someone with a SMP alpha box might also want to give this a spin I suppose.
>
beast (alpha ref machine in the cluster) has dual processors, if something
special needs to be done to test this we could arrange something.
--
Ken Smith
- From there to here, from here to | kensmith@cse.buffalo.edu
there, funny things are everywhere. |
- Theodore Geisel |
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