Date: Fri, 26 Jan 2018 00:13:12 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Ian FREISLICH <ian.freislich@capeaugusta.com> Cc: current <current@freebsd.org> Subject: Re: Insta-reset-bootloop with r328166 and vm.pmap.pcid_enabled=1 Message-ID: <20180125221312.GU55707@kib.kiev.ua> In-Reply-To: <9e533d36-f2ee-58fc-d629-eed7d70645b4@capeaugusta.com> References: <9e533d36-f2ee-58fc-d629-eed7d70645b4@capeaugusta.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, Jan 25, 2018 at 04:58:04PM -0500, Ian FREISLICH wrote: > Hi > > I cannot for the life of me recall why I had vm.pmap.pcid_enabled=1 set > in loader.conf, but I did.š Most likely very historical reasons. > > r328166 and later reset without dropping into the debugger during boot, > no panic message. Yes, this is how it is currently behaves. PCID can be used to optimize PTI, see https://reviews.freebsd.org/D13985. It is used for very differrent algorithm when PTI=1, comparing with PTI=0.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20180125221312.GU55707>