Date: Thu, 3 Feb 2005 12:47:21 -0500 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-current@FreeBSD.org Cc: Jeremie Le Hen <jeremie@le-hen.org> Subject: Re: cvs commit: src/sys/dev/md md.c Message-ID: <200502031247.22241.jhb@FreeBSD.org> In-Reply-To: <79659.1106645826@critter.freebsd.dk> References: <79659.1106645826@critter.freebsd.dk>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tuesday 25 January 2005 04:37 am, Poul-Henning Kamp wrote: > In message <20050124134546.GB59685@obiwan.tataz.chchile.org>, Jeremie Le Hen writes: > >While talking about WITNESS, I checked my kernel config and remembered > >that FULL_PREEMPTION is on. The panic disappeared when I turned off > >the latter : I managed to create up to about 16 md(4) devices. I know > >this should not be enabled for users, but I'm interested in "exposing > >race conditions" as said in the comment. > > Well, you clearly did :-) > > I suggest you send a summary of what you have found to jhb@freebsd.org, > he's working on the FULL_PREEMPTION stuff. FULL_PREEMPTION just preempts more often is all. It's still probably a locking bug of some sort. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200502031247.22241.jhb>