On Sat, 2014-11-15 at 10:43 -0800, Steve Kargl wrote: > Before I totally hose by /usr/src directory, does anyone > have some guidelines on doing a binary search for a rogue > commit in /usr/src/sys?. Either cam or usb (or acpi?) has > broken the ability to remove a external USB device once it > is plugged into a usb port on my Dell Latitude D530 laptop. > I know that a good kernel can be built with r271273 and > a bad kernel comes from (nearly) top of tree at r274456. > > I assume I need to do somthing along the lines > > % cd /usr/src/sys > % svn merge -r 274456:272864 (half way point between good and bad) > (build kernel and test) > % cd /usr/src/sys > % svn revert -R . > (assume 272864 builds working kernel) > % svn merge -r 274456:273660 (1/2 point between 272864 and 274456). > > Rinse and repeat. >
I've always used 'svn up -rnnnnnn' to bisect. No need to revert, just repeatedly update to the next halfway point, and when you're all done, -rHEAD to get back to normal. I've also had very good results with using -DNO_CLEAN on kernel bisects, it lets you zoom in quickly then when you think you have a candidate you can do a more complete clean-and-rebuild to be sure. Sometimes build glitches will require a clean rebuild at some bisect points. -- Ian _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"