Date: Thu, 26 Mar 2026 08:17:38 -0700 From: "Chuck Tuffli" <chuck@tuffli.net> To: "Sean Eric Fagan" <Sean.fagan@klarasystems.com>, "FreeBSD virtualization" <freebsd-virtualization@freebsd.org> Cc: "markj@freebsd.org" <markj@freebsd.org> Subject: Re: bhyve and controlled errors Message-ID: <0de221d3-40e5-431c-826f-4ba22c20ca17@app.fastmail.com> In-Reply-To: <F7A52994-0294-4C99-86F4-7204AE2D6CB9@klarasystems.com>
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[-- Attachment #1 --] On Thu, Mar 26, 2026, at 7:56 AM, Sean Eric Fagan wrote: > I’d asked Mark about this and he suggested I bring it up on the list: > > Has anyone thought about implementing controls / tunables to bhyve to introduce errors? I am, most specifically right now, thinking about causing disk I/O errors, or having requests dropped by the "hardware," to test error handling. > > Last time I looked at the bhyve source code, it scared me, so if someone else has looked at this, I’m love to know. I prototyped something like this a few years back https://papers.freebsd.org/2019/bsdcan/tuffli-frankensteins_disk_drive/ Happy to discuss it more if you are interested. —chuck [-- Attachment #2 --] <!DOCTYPE html><html><head><title></title></head><body><div><br></div><div><br></div><div>On Thu, Mar 26, 2026, at 7:56 AM, Sean Eric Fagan wrote:</div><blockquote type="cite" id="qt" style=""><div>I’d asked Mark about this and he suggested I bring it up on the list:</div><div><br></div><div>Has anyone thought about implementing controls / tunables to bhyve to introduce errors? I am, most specifically right now, thinking about causing disk I/O errors, or having requests dropped by the "hardware," to test error handling.</div><div><br></div><div>Last time I looked at the bhyve source code, it scared me, so if someone else has looked at this, I’m love to know.<br></div></blockquote><div><br></div><div>I prototyped something like this a few years back</div><div><br></div><div><a href="https://papers.freebsd.org/2019/bsdcan/tuffli-frankensteins_disk_drive/">https://papers.freebsd.org/2019/bsdcan/tuffli-frankensteins_disk_drive/</a></div><div><br></div><div>Happy to discuss it more if you are interested. </div><div><br></div><div>—chuck </div></body></html>home | help
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