Date: Tue, 27 Jan 2026 11:39:26 +0800 From: Zhenlei Huang <zlei@FreeBSD.org> To: "Jonathan T. Looney" <jtl@freebsd.org> Cc: FreeBSD Current <current@freebsd.org> Subject: Re: Heads up: New WITNESS output Message-ID: <93A15E94-C5FD-44B2-858E-595E9188A530@FreeBSD.org> In-Reply-To: <CADrOrmvCD3NT4iOYK5S63kXJLT1M_BBVWT5dyW5rd2LUxeyx3A@mail.gmail.com>
index | next in thread | previous in thread | raw e-mail
[-- Attachment #1 --] > On Jan 27, 2026, at 4:33 AM, Jonathan T. Looney <jtl@freebsd.org> wrote: > > Hi Folks, > > As a heads-up, I just committed a change to the WITNESS output. It will now print more detailed information when a lock ordering was established through a chain of locks (e.g. lock1 is locked before lock2, lock2 is locked before lock3; therefore, locking lock3 before lock1 is a LOR). > > An example of the new output is in the review request (https://reviews.freebsd.org/D54785 <https://reviews.freebsd.org/D54785>). > > If you want to restore the old behavior, you can set the debug.witness.trace sysctl/tunable to 1. > > In the meantime, please let me know if you run into any trouble with the new functionality. > > Jonathan Hi Jonathan, That is a nice feature. I have been confused by the LOR report for many times. Thanks for your work ! Best regards, Zhenlei [-- Attachment #2 --] <html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jan 27, 2026, at 4:33 AM, Jonathan T. Looney <<a href="mailto:jtl@freebsd.org" class="">jtl@freebsd.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hi Folks,<div class=""><br class=""></div><div class="">As a heads-up, I just committed a change to the WITNESS output. It will now print more detailed information when a lock ordering was established through a chain of locks (e.g. lock1 is locked before lock2, lock2 is locked before lock3; therefore, locking lock3 before lock1 is a LOR).</div><div class=""><br class=""></div><div class="">An example of the new output is in the review request (<a href="https://reviews.freebsd.org/D54785" class="">https://reviews.freebsd.org/D54785</a>).</div><div class=""><br class=""></div><div class="">If you want to restore the old behavior, you can set the debug.witness.trace sysctl/tunable to 1.</div><div class=""><br class=""></div><div class="">In the meantime, please let me know if you run into any trouble with the new functionality.</div><div class=""><br class=""></div><div class="">Jonathan</div></div> </div></blockquote><br class=""></div><div>Hi Jonathan,</div><div><br class=""></div><div>That is a nice feature. I have been confused by the LOR report for <span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">many times. </span>Thanks for your work !</div><br class=""><div class=""> <div>Best regards,</div><div>Zhenlei</div> </div> <br class=""></body></html>home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?93A15E94-C5FD-44B2-858E-595E9188A530>