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| author | Andrew Gallatin <gallatin@FreeBSD.org> | 2002-07-17 02:23:44 +0000 |
|---|---|---|
| committer | Andrew Gallatin <gallatin@FreeBSD.org> | 2002-07-17 02:23:44 +0000 |
| commit | fe79953325321e0e7753af60b2baf85413702ef0 (patch) | |
| tree | 5924547463c69dff00bd745cf367d4a708e9a16e /sys/kern/kern_switch.c | |
| parent | fb36a3d8472e3b7c446b5501635ec34eb1ebaa00 (diff) | |
| download | src-fe79953325321e0e7753af60b2baf85413702ef0.tar.gz src-fe79953325321e0e7753af60b2baf85413702ef0.zip | |
Allow alphas to do crashdumps: Refuse to run anything in choosethread()
after a panic which is not an interrupt thread, or the thread which
caused the panic. Also, remove panicstr checks from msleep() and from
cv_wait() in order to allow threads to go to sleep and yeild the cpu
to the panicing thread, or to an interrupt thread which might
be doing the crashdump.
Reviewed by: jhb (and it was mostly his idea too)
Notes
Notes:
svn path=/head/; revision=100209
Diffstat (limited to 'sys/kern/kern_switch.c')
| -rw-r--r-- | sys/kern/kern_switch.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/kern/kern_switch.c b/sys/kern/kern_switch.c index 4ae03a928950..9629ac241403 100644 --- a/sys/kern/kern_switch.c +++ b/sys/kern/kern_switch.c @@ -124,6 +124,7 @@ choosethread(void) struct thread *td; struct ksegrp *kg; +retry: if ((ke = runq_choose(&runq))) { td = ke->ke_thread; KASSERT((td->td_kse == ke), ("kse/thread mismatch")); @@ -157,6 +158,9 @@ choosethread(void) td = PCPU_GET(idlethread); CTR1(KTR_RUNQ, "choosethread: td=%p (idle)", td); } + if (panicstr && ((td->td_proc->p_flag & P_SYSTEM) == 0 && + (td->td_flags & TDF_INPANIC) == 0)) + goto retry; td->td_state = TDS_RUNNING; return (td); } |