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Re: kern/58531 (NetBSD 10.0 deadlock in nd_timer)

To: gnats-bugs%netbsd.org@localhost, kern-bug-people%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, rin%NetBSD.org@localhost, manu%netbsd.org@localhost, ozaki-r%NetBSD.org@localhost, Taylor R Campbell <riastradh%NetBSD.org@localhost>
Subject: Re: kern/58531 (NetBSD 10.0 deadlock in nd_timer)
From: Rin Okuyama <rokuyama.rk%gmail.com@localhost>
Date: Thu, 15 Aug 2024 11:44:42 +0900

On 2024/08/15 11:39, rin%NetBSD.org@localhost wrote:

Patch seems applicable and necessary for netbsd-9 also, for which
if_vmx.c, usbnet.c, and if_ipsec.c advertise IFEF_MPSAFE regardless of
NET_MPSAFE. I will send a request after ATF runs.


Oops, *not* applicable actually; kern_event.c uses the giant lock
unconditionally for netbsd-9.

If we wish to avoid deadlocks, we need to drop IFEF_MPSAFE for
non-NET_MPSAFE kernels?

Thanks,
rin

Follow-Ups:
- re: kern/58531 (NetBSD 10.0 deadlock in nd_timer)
  - From: matthew green

References:
- Re: kern/58531 (NetBSD 10.0 deadlock in nd_timer)
  - From: rin

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