Date: Mon, 28 Mar 2022 22:38:46 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: John Baldwin <jhb@FreeBSD.org>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: ktrace on NFSroot failing? Message-ID: <YT2PR01MB9730F8A4D6024B0CB8EC79EFDD1D9@YT2PR01MB9730.CANPRD01.PROD.OUTLOOK.COM> In-Reply-To: <70135754-84c2-b642-5641-0721e0b4690d@FreeBSD.org> References: <alpine.BSF.2.00.2203101514090.68830@ai.fobar.qr> <CAGudoHGCOVQy7CVySkNKey0QYi2zqO8UqBUcACzmWH4B-ZpsuQ@mail.gmail.com> <70135754-84c2-b642-5641-0721e0b4690d@FreeBSD.org>
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John Baldwin <jhb@FreeBSD.org> wrote: > On 3/10/22 8:14 AM, Mateusz Guzik wrote: >> On 3/10/22, Bjoern A. Zeeb <bzeeb-lists@lists.zabbadoz.net> wrote: >>> Hi, >>> >>> I am having a weird issue with ktrace on an nfsroot machine: >>> >>> root:/tmp # ktrace sleep 1 >>> root:/tmp # kdump >>> -559038242 Events dropped. >>> kdump: bogus length 0xdeadc0de >>> >>> Anyone seen something like this before? >>> >> >> I just did a quick check and it definitely fails on nfs mounts: >> # ktrace pwd >> /root/mjg >> # kdump >> -559038242 Events dropped. >> kdump: bogus length 0xdeadc0de >> >> I don't have time to look into it this week though. I have committed the patch (that was attached to a previous email) to main, since bz@ confirmed via email that it fixed the ktrace problem for him. >Possibly related: core dumps are no longer working for me on NFS >mounts. I get a 0 byte foo.core instead of a valid core dump. If core dumps still fail for a main with the patch, please let us know, so we can investigate further. Thanks and sorry for the breakage, rick -- John Baldwinhelp
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