Date: Mon, 20 Nov 2006 01:04:36 -0800 From: Bakul Shah <bakul@bitblocks.com> To: freebsd-current@freebsd.org Subject: unkillable qemu: sleeping in devdrn state Message-ID: <20061120090436.71B205B3E@mail.bitblocks.com>
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With a fairly recent -current kernel qemu sleeps in "devdrn" state and is unkillable. /proc doesn't have qemu's pid entry but it does show up in a ps listing! This bug is not 100% repeatable but close enough. AFAIK this problem appears only when kqemu is used with qemu. This refcounting related problem has been reported for a number of other devices. In one such thread (on cvs-all, Subject: Re: cvs commit: src/sys/kern kern_conf.c) Tai-hwa Liang has analyzed the problem and suggested a workaround for a couple of devices. Rather than mucking with all the device drivers, I hope a global fix is possible. Perhaps the original fix by Tor Egge is not the only way to fix the bug? I haven't analyzed the problem so likely I am talking through my hat. "You are in a maze of twisty little passages, all alike"
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