-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 01/07/13 16:02, Konstantin Belousov wrote: > On Mon, Jan 07, 2013 at 03:54:23PM -0800, Xin Li wrote: >> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 >> >> Hi, >> >> I've recently (by mid-December I think) noticed that sysctl -a >> can sometimes cause kernel trap 12. Tried enabling INVARIANTS >> and the problem mysteriously disappeared. After some experiments >> on this, it seems that this can be triggered by sysctl -a but the >> system have an 1 in 10 chance to survive. When INVARIANTS is >> enabled however, I can not trigger the panic. "sysctl hw" >> triggers the panic sometimes, but not always. >> >> Do anybody have clue on this? The system hangs hard when it >> panics so kernel debugger won't work. When it panics, the fault >> instruction pointer is always 0x20:0xffffffff808d61c9, which is >> sys/kern/subr_turnstile.c:297: >> >>> /* Resort td on the list if needed. */ if >>> (!turnstile_adjust_thread(ts, td)) { >>> mtx_unlock_spin(&ts->ts_lock); // 297 // return; } >> >> This sounds like a race condition but I haven't yet able to track >> it down... > > Could you try to isolate the sub-leaf under hw which causes the > panic ? Just shot in the dark, do you have Intel GPU gemified > driver loaded ? It seems that it was not hw itself that causes the problem (I thought about isolating to sub-leaf and at one point believed it was hw.acpi.battery but doing so repeatedly doesn't panic the system, with or without INVARIANTS; doing 'sysctl hw' sometimes causes panic but not always). The laptop is running nVidia but it's using i7-3610QM which does have Intel GPU, but I have not loaded drm2.ko and the panic is reproducible in single user mode. Cheers, - -- Xin LI <delphij_at_delphij.net> https://www.delphij.net/ FreeBSD - The Power to Serve! Live free or die -----BEGIN PGP SIGNATURE----- iQEcBAEBCAAGBQJQ62OpAAoJEG80Jeu8UPuzsYgH/iw8ispGuIqYkDAcfH1rh2AR MvSF3kf6OsPUAm3hRpa+VGcwssqgPTnyTgB2AGDPQ4FPurep/9sVD7rEmjy+4jFY 6bpUvirTcfSVnuEXWKq+ySaq7K+zR9SvorNMOnufS91oY+hzwwnZd3iykjhLAAth MNjmhAoSsT+MHvMBNweIoWA7FH9MxE7yfOi89foM/ZTcbibt9vY+gTpAPAlrfsab xG1w8aQhgX6/91QZGh8E1nVDo8vqO9Fqte+tkaZbEh3eJQFx8uRktvAps6T052T/ la/1zzGoqxfZZRbc0/bK7CnhyM4N5xPM1Q+eB2Q9F6F/S+XQPPhASnJNJXh0XAw= =tCfp -----END PGP SIGNATURE-----Received on Mon Jan 07 2013 - 23:09:16 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:40:33 UTC