Comment 39 for bug 330824

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Theodore Ts'o (tytso) wrote :

@yaztromo,

Can you tell me what you do to try to reproduce the problem? As I mentioned, I haven't been able to reproduce it myself, so I've had to rely other people's bug reports. If there's someone who is familiar with "git bisect", it would be really useful to try to do a "git bisect start v2.6.28 2.6.29 -- fs/ext4 fs/jbd2", reversing the sense of "git bisect good" and "git bisect bad" (i.e., if you can reproduce it, call it "git bisect good", and if you can't reproduce the soft lock, call it "git bisect bad"). It would probably require half a dozen builds or so but at the end of it, it would point us at a patch which apparently fixed the bug. (There are 91 commits invloving either the fs/ext4 or fs/jbd2 directories between .28 and .29, and log base 2 of 91 is about 6.5; so it will require approximately 7 git bisect tests in order to localize things down to a single commit.)

Again, this is mostly useful so we can tell the Ubuntu kernel devs which patch to backport for the official Ubunut Jaunty kernel. (Fedora 11 is going to be using 2.6.29, so they won't see this issue.) So unless someone can help me reproduce it on my test system (which is a 1Gig netbook with a 5400 rpm drive running Ubuntu 8.10 with an updated kernel), I really will need someone who can reproduce it and who knows how to drive git and do kernel builds out of a git source tree to localize this down.