Re: heartbeat panic: swapping?

[Thomas Klausner <wiz%netbsd.org@localhost>]

On Tue, Feb 17, 2026 at 08:41:57PM +0100, Lloyd Parkes wrote:
> 
> On 17/02/2026 20:34, Thomas Klausner wrote:
> > Hi!
> > 
> > I woke up to
> > 
> > savecore: reboot after panic: [ 312649.0082489] panic: cpu0: softints stuck for 16 seconds
> > 
> > (gdb) target kvm netbsd.27.core
> > 0xffffffff80239eca in cpu_reboot (howto=howto@entry=260, bootstr=bootstr@entry=0x0) at /usr/src/sys/arch/amd64/amd64/machdep.c:709
> > 709			dumpsys();
> > (gdb) bt
> > #0  0xffffffff80239eca in cpu_reboot (howto=howto@entry=260, bootstr=bootstr@entry=0x0) at /usr/src/sys/arch/amd64/amd64/machdep.c:709
> > #1  0xffffffff80e2bfbf in kern_reboot (howto=howto@entry=260, bootstr=bootstr@entry=0x0) at /usr/src/sys/kern/kern_reboot.c:91
> > #2  0xffffffff80e77295 in vpanic (fmt=fmt@entry=0xffffffff816f1d30 "%s: softints stuck for %u seconds", ap=ap@entry=0xffffa72469e83bd0) at /usr/src/sys/kern/subr_prf.c:288
> > #3  0xffffffff80e7736a in panic (fmt=fmt@entry=0xffffffff816f1d30 "%s: softints stuck for %u seconds") at /usr/src/sys/kern/subr_prf.c:209
> > #4  0xffffffff80e0e03c in heartbeat () at /usr/src/sys/kern/kern_heartbeat.c:702
> > #5  0xffffffff80df34ad in hardclock (frame=0xffffa72469e83ce8) at /usr/src/sys/kern/kern_clock.c:342
> > #6  0xffffffff8021075e in Xresume_lapic_ltimer ()
> 
> I've seen this before, but not since I started running a kernel from
> 2026-01-22 (NZDT).
> 
> I don't know how hard I've pushed that system since then, but I had three
> crashes in two days before I built that kernel.

Thanks for the data point.

I should have mentioned - the kernel was very new (20260213) to test
the swapctl fixes.
 Thomas