Re: port-evbarm/60269 (System hangs NetBSD/evbarm(aarch64) 11.0_RC4)

[riastradh%NetBSD.org@localhost]

Synopsis: System hangs NetBSD/evbarm(aarch64) 11.0_RC4

State-Changed-From-To: open->feedback
State-Changed-By: riastradh%NetBSD.org@localhost
State-Changed-When: Sat, 16 May 2026 19:05:31 +0000
State-Changed-Why:
The transcript of the screenshot you shared shows that:

- ls, cron, and python3.13 are all waiting for some rwlock, probably
  waiting for a vnode, but we're not sure which one.

- estd is busy on the CPU (l_stat = 7 = LSONPROC) and has been noted as
  a CPU hog (l_flag = 0x40000 = LW_BATCH).

Next time this happens, can you share the output of the following
commands in ddb?

1. show all tstiles
2. ps/w
3. bt (if estd is in userland, it might be nonsense, but if it's stuck
   in a loop in the kernel, it's worth a shot)

This might help us to track down who's holding the rwlock that the
waiters are waiting for.