Date: Mon, 11 Oct 2004 10:29:17 -0700 From: Paul Allen <eng@donut.ugcs.caltech.edu> To: current@freebsd.org Subject: 5.3-Beta7/RELENG_5, AGP/drm hard lock on xserver termination Message-ID: <20041011172917.GC91892@philemon.caltech.edu>
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Since installing RELENG_5 (marked as 5.3-Beta7) I've experienced hard locks on xserver termination and more generally when switching between the xserver and the other text-mode ttys. This happens with GENERIC + a custom kernel with SMP removed. I built a kernel with the debugger, witness, and invariants only to discover that what had been very easy to reproduce simply went away. I suspect I've just made it much less probable... so I'll go at it some more tonight after work. AGP/drm locking suspected culprit? Can locking mistakes create problems on UP systems? Because of kernel thread preemption? I have a vague sense I've read about a similar issue on this list before, so if this is known problem, let me know so I don't waste my time. Thanks.
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