cvs commit: src/sys/kern subr_witness.c

Andrew R. Reiter arr at
Mon Dec 27 14:31:03 PST 2004

On Mon, 27 Dec 2004, John Baldwin wrote:

:On Sunday 26 December 2004 07:54 pm, Kris Kennaway wrote:
:> On Sun, Dec 26, 2004 at 10:52:24PM +0000, Robert Watson wrote:
:> > rwatson     2004-12-26 22:52:24 UTC
:> >
:> >   FreeBSD src repository
:> >
:> >   Modified files:
:> >     sys/kern             subr_witness.c
:> >   Log:
:> >   Add "show alllocks" command to DDB, which dumps a list of processes
:> >   and threads currently holding sleep mutexes (and spin mutexes for
:> >   curthread).  This can be quite useful in looking for a lock condition
:> >   summary for a system, as it avoids manually iterating through threads
:> >   and processes to find all the interesting locks.
:> >
:> >   NB: "alllocks" is up there with "lockedvnods" for a bad argument for
:> >   show.
:> ITYM "allloks" or perhaps "alllockes" (conservation of vowels).
:If you want a better name you could do 'show locks /a' instead.  That is, add
:support to 'show locks' for the /a option (see 'show ktr' for how you would
:handle this by looking at 'modif').

Seems like a good idea to me, John.  My only -- very minor -- issue with
that is using '/' as the flag delimiter.  Not trying to be an asshole or
anything, just seems to me that (unless there is some ddb options already
there that use '/') using the forward slash is very cmd.exe-esque.

I agree, however, that having show locks <flag-option> is a good idea
instead of two different commands.


Andrew R. Reiter
arr at
arr at

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