Re: TSTILE lockups on disk dump/backups

I installed the 10.1 kernel on my recently upgraded NetBSD 9.4 system. =
Until the 10.1 kernel, my umps were running, with the occasional TSTILE =
lockup. All seemed to be working with the 10.1 kernel, with no TSTILE =
lockups so far, until the weekly backups ran.

First symptom was that the =E2=80=9Cverify=E2=80=9D pass of my dumps was =
generating thousands of errors. I broke the verify apart from the dump, =
and ran the verify pass on the dump files already generated. I =
discovered that the dumps were the problem, not the verify. I tried =
running the gzipped dump files to disk, and verifying those dump files. =
Dump files written to disk, and then read from disk ran fine. Dumps run =
to NFS, and then read from NFS generate errors.

As an added check, I copied the dumps that I ran to disk over to NFS =
(using cp(1)), and ran the verify on the NFS copy. Verify ops from NFS =
of copied dump files came through without error. This strongly suggests =
that the "dump | gzip=E2=80=9D operation was generating bad data.

The pipe for my dump operations is:


The dumps run with:

	LABEL=3DYYMMDD # time/date label
	STAGE=3Dtarget.gz
	FS=3D	/usr	# filesystem to be dumped - / /usr /var /home
	dump -t -0  -f - -L ${LABEL} -a ${FS} | gzip -c > ${STAGE}

Evidence suggests strongly that data piped into gzip and run to NFS get =
corrupted.

uname -a:

	NetBSD mercy 10.1 NetBSD 10.1 (GENERIC) #0: Mon Dec 16 13:08:11 =
UTC 2024 =
[email protected]:/usr/src/sys/arch/macppc/compile/GENERIC =
macppc=20

Am I doing something wrong, or do we have an NFS bug in 10.1??

-dgl-


>> On Jan 1, 2025, at 9:48 AM, Rin Okuyama <[email protected]> =
wrote:
>>=20
>> Hi,
>>=20
>> Can you please try kernel from 10.1 release (or -current)?
>>=20
>> https://ftp.netbsd.org/pub/NetBSD/NetBSD-10.1/macppc/binary/sets/
>>=20
>> It should be working with 9.x userland.
>>=20
>> For netbsd-9, pmap for powerpc/oea is known to be broken.
>> But, unfortunately, it exceeds our capacity to pull up
>> fixes made to -current/netbsd-10 at the moment...
>>=20
>> Thanks,
>> rin
>>=20
>> On 2024/12/31 14:34, Don Lee wrote:
>>> Another instance of the tstile hang with dump/gzip/nfs
> [snip]
>=20