Date: Thu, 6 Jul 2023 17:08:06 -0700 From: Mark Millard <marklmi@yahoo.com> To: John F Carr <jfc@mit.edu> Cc: Current FreeBSD <freebsd-current@freebsd.org>, freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: For snapshot builds: armv7 chroot on aarch64 has kyua test -k /usr/tests/Kyuafile sys/kern/kern_copyin hung up [in getpid?], unkillable, prevents reboot Message-ID: <1DA4804D-38FA-4844-9869-63563C473B7D@yahoo.com> In-Reply-To: <C0D78776-E8DF-4141-B636-658116E94DBC@mit.edu> References: <7A41DED4-876F-4270-A980-549A4832B39A.ref@yahoo.com> <7A41DED4-876F-4270-A980-549A4832B39A@yahoo.com> <C0D78776-E8DF-4141-B636-658116E94DBC@mit.edu>
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On Jul 6, 2023, at 16:53, John F Carr <jfc@mit.edu> wrote:
> On Jun 25, 2023, at 20:16, Mark Millard <marklmi@yahoo.com> wrote:
>>
>> . . .
>>
>
> The hang is caused by the sysctl call in tests/sys/kern/kern_copyin.c. The function below hangs when called in a 32 bit ARM process running in a chroot environment on a 64 bit ARM system. I will write up a bug report.
>
> static int
> get_vm_layout(struct kinfo_vm_layout *kvm)
> {
> size_t len;
> int mib[4];
>
> mib[0] = CTL_KERN;
> mib[1] = KERN_PROC;
> mib[2] = KERN_PROC_VM_LAYOUT;
> mib[3] = getpid();
> len = sizeof(*kvm);
>
> return (sysctl(mib, nitems(mib), kvm, &len, NULL, 0));
> }
>
Thanks for the tiny-reproducer analysis! That should help
make getting to a fix more actionable.
===
Mark Millard
marklmi at yahoo.com
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