Date: Mon, 4 Oct 2004 10:34:31 -0400 From: John Baldwin <jhb@FreeBSD.org> To: David Schultz <das@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/kern kern_fork.c Message-ID: <200410041034.32221.jhb@FreeBSD.org> In-Reply-To: <200410010501.i9151US7086474@repoman.freebsd.org> References: <200410010501.i9151US7086474@repoman.freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Friday 01 October 2004 01:01 am, David Schultz wrote: > das 2004-10-01 05:01:29 UTC > > FreeBSD src repository > > Modified files: > sys/kern kern_fork.c > Log: > Avoid calling _PHOLD(p1) with p2's lock held, since _PHOLD() > may block to swap in p1. Instead, call _PHOLD earlier, at a > point where the only lock held happens to be p1's. FWIW, I don't think this can actually happen because curthread belonging to p1 is executing and it wouldn't be executing unless it was swapped in, so I don't think that PHOLD could ever have blocked. -- 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?200410041034.32221.jhb>