Date: Fri, 11 Dec 2009 12:44:05 -0600 From: Greg Miller <gmiller@classic-games.com> Cc: freebsd-stable@freebsd.org Subject: Re: Extreme console latency during disk IO (8.0-RC1, previous releases also affected according to others) Message-ID: <4B2292F5.1030604@classic-games.com> In-Reply-To: <hbhjqf$sjk$3@ger.gmane.org> References: <E316139E-FFCF-432F-8DCE-62B120C38E55@exscape.org> <CC16B639-7A75-4016-A8A8-5C59E9CD5E95@exscape.org> <hb1qs0$qjd$1@ger.gmane.org> <alpine.BSF.2.00.0910131406340.26071@fledge.watson.org> <9bbcef730910130633w150571a0k461fb4e67a51fb1d@mail.gmail.com> <B5BA3ACC-BC06-4042-8434-0D9395A0F478@freebsd.org> <hb23i7$opq$1@ger.gmane.org> <alpine.BSF.2.00.0910130957540.26159@thebighonker.lerctr.org> <9bbcef730910131057i71db846et1f0d4aeadef5e302@mail.gmail.com> <hb6rhk$8t8$1@ger.gmane.org> <hbhjqf$sjk$3@ger.gmane.org>
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Ivan Voras wrote: > Ivan Voras wrote: > >> Another data point - the OS in the VM in question hanged today >> sometime after 5 AM in the following way: >> >> * console nonresponsive (also to ctrl-alt-del) >> * ssh login nonresponsive (timeout) >> * ping works (!) >> >> Judging by the last seen timestamp, the machine should have been in >> the process of receiving rsync backups - so IO-bound. > > It looks like something really could be fishy in this area, at least > with VMWare. The same thing happened again, and I have an additional > data point: I left 'top' running on the console and when I attached the > VMWare console to the VM, the top was still running ok, but as soon as I > hit a key on the keyboard, the OS console locked up. All other symptoms > were as I enumerated above. A buildworld is enough to kill the console for me under QEMU on a slow Windows host. Never seen problems with a native install of FreeBSD, though. -- http://www.velocityvector.com/ | http://www.classic-games.com/ Any government that can give you everything you want can take everything you have.
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