On Mon, Sep 27, 2021 at 06:56:39PM +0200, Mike Galbraith wrote: > I then perfectly cleanly bisected the little bugger to the below. > Mmm.. not convinced. Suggestions? Yah, that doesn't look like a tip commit to me. Hmm, maybe we've pulled in some broken stuff. So what I do in such cases is bisect the tip merge commits: $ git log --oneline --merges tip/master d478ddf4e3cf Merge remote-tracking branch 'tip/irq/urgent' into tip-master f9bfed3ad5b1 Merge tag 'irqchip-fixes-5.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent 430117f4e609 Merge branch 'tip-x86-urgent' into tip-master d2134885549e Merge remote-tracking branch 'tip/x86/cpu' into tip-master 723c56e57a63 Merge remote-tracking branch 'tip/timers/urgent' into tip-master f1dfe445713e Merge remote-tracking branch 'tip/ras/core' into tip-master ad214c6bf962 Merge remote-tracking branch 'tip/x86/fpu' into tip-master b93350f79ec6 Merge remote-tracking branch 'tip/x86/urgent' into tip-master f6d58d7648d4 Merge remote-tracking branch 'tip/x86/misc' into tip-master b386cdf52519 Merge remote-tracking branch 'tip/x86/core' into tip-master 9a91b66ea202 Merge remote-tracking branch 'tip/irq/core' into tip-master 9665682cd5c3 Merge remote-tracking branch 'tip/sched/core' into tip-master 2e0f59f0ccbd Merge remote-tracking branch 'tip/x86/cleanups' into tip-master 66dced5982db Merge remote-tracking branch 'tip/locking/core' into tip-master 0a3dd0c68cfd Merge remote-tracking branch 'tip/locking/wwmutex' into tip-master bec64008cfba Merge remote-tracking branch 'tip/perf/core' into tip-master c6999a0491f7 Merge remote-tracking branch 'tip/objtool/core' into tip-master 9261e152ecf4 Merge remote-tracking branch 'tip/x86/cpu' into tip-master ... You can either start in the middle of that list above and jot down in a text file which merge is ok and which is not ok or you can simply get the latest master, and start merging bottom to top, one by one and test each merge in the process. That would at least tell us which branch introduces the problem and then we can drill down deeper. HTH. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
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