On Sun, May 05, 2013 at 10:01:00AM +0400, de...@stasyan.com wrote: d> Hello ! d> d> This problems appears about 4-6 months ago after updating of -CURRENT host. d> Unable to boot host with nvidia_load="YES" in loader.conf because panic. d> But when nvidia driver loads manually via kldload, everything OK. d> Nvidia driver version is 310.44 at this moment, but problem was and on d> earlier version too. d> d> Here is output of debugging (full version at d> http://www.stasyan.com/devel/kern_crash_nvidia_autoload.txt)
Can you please try the attached patch to kernel? -- Totus tuus, Glebius.
Index: kern/kern_sysctl.c =================================================================== --- kern/kern_sysctl.c (revision 249327) +++ kern/kern_sysctl.c (working copy) @@ -1406,7 +1406,7 @@ static int sysctl_root(SYSCTL_HANDLER_ARGS) { struct sysctl_oid *oid; - int error, indx, lvl; + int error, indx, lvl, giantlocked; SYSCTL_ASSERT_XLOCKED(); @@ -1488,10 +1488,13 @@ sysctl_root(SYSCTL_HANDLER_ARGS) oid->oid_running++; SYSCTL_XUNLOCK(); - if (!(oid->oid_kind & CTLFLAG_MPSAFE)) + if (!(oid->oid_kind & CTLFLAG_MPSAFE)) { + giantlocked = 1; mtx_lock(&Giant); + } else + giantlocked = 0; error = oid->oid_handler(oid, arg1, arg2, req); - if (!(oid->oid_kind & CTLFLAG_MPSAFE)) + if (giantlocked) mtx_unlock(&Giant); KFAIL_POINT_ERROR(_debug_fail_point, sysctl_running, error);
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