Hi! Here is my sixth regression report for Linux 4.7. It lists 8 regressions I'm currently aware of; 2 of them are new.
The report also mentions 3 regressions that were fixed since the last report(¹). There were a few ones that were reported to me in the past week (many thx for that!) and fixed already, which I did not add to the list. As usual: Please let me know about any regression missing on the list or if it contains something which shouldn't be there. I'm afk next weekend, so this likely will be the last regression report before 4.7 gets released. But I guess I'll write at least one or two more reports after that to make sure regressions found after the release get collected somewhere. HTH, CU, Thorsten (¹) previous reports can be found at http://thread.gmane.org/gmane.linux.kernel/2241805 http://thread.gmane.org/gmane.linux.kernel/2247804 http://thread.gmane.org/gmane.linux.kernel/2253623 http://thread.gmane.org/gmane.linux.kernel/2258287 http://thread.gmane.org/gmane.linux.kernel/2262759 == Current regressions == Desc: 795ae7a0de: pixz.throughput -9.1% regression Repo: 2016-06-02 http://thread.gmane.org/gmane.linux.kernel/2233056/ Stat: 2016-06-22 http://thread.gmane.org/gmane.linux.kernel/2233056/focus=2251134 Note: stalled; hannes can't reproduce and waits for reporter to post results from more tests Desc: System hang when plug/un-plug USB 3.1 key via thunderbolt port on Dell XPS 13 Repo: 2016-06-14 https://bugzilla.kernel.org/show_bug.cgi?id=120241 Stat: 2016-07-16 https://bugzilla.kernel.org/show_bug.cgi?id=120241#c37 Note: wip, but root cause hard to track down Desc: regression in 8250 uart driver Repo: 2016-06-14 http://thread.gmane.org/gmane.linux.kernel/2243130/focus=2243653 Stat: 2016-07-02 http://thread.gmane.org/gmane.linux.kernel/2243130/focus=2258232 Note: andy has it still on his todo list, but something else has a higher priority Desc: Multi-thread udp 4.7 regression, bisected to 71d8c47fc653; performance decreased or complete failure with a test Repo: 2016-06-27 http://thread.gmane.org/gmane.linux.network/418861/focus=418908 Stat: 2016-07-12 http://thread.gmane.org/gmane.linux.network/418861/focus=63936 Note: patch "netfilter: conntrack: skip clash resolution if nat is in place" in the net tree fixes this Desc: kmemcheck: Caught 64-bit read from uninitialized memory; iptables/nf_register_net_hooks Repo: 2016-06-19 https://bugzilla.kernel.org/show_bug.cgi?id=120651 Stat: 2016-07-11 https://bugzilla.kernel.org/show_bug.cgi?id=120651#c2 Note: reporter wanted to recheck, nothing new since then Desc: UBSAN splat in drivers/acpi/acpica/dsutils.c:641:16 Repo: 2016-06-15 https://bugzilla.kernel.org/show_bug.cgi?id=120351 Stat: 2016-06-22 https://bugzilla.kernel.org/show_bug.cgi?id=120411#c3 Note: wonder if this is important enough to investigate further; related, similar bugs: https://bugzilla.kernel.org/show_bug.cgi?id=120411 https://bugzilla.kernel.org/show_bug.cgi?id=120391 https://bugzilla.kernel.org/show_bug.cgi?id=120371 https://bugzilla.kernel.org/show_bug.cgi?id=120361 Not sure which of them are regressions Desc: After commit f21a21983ef13a, the i915 display is turned off Repo: 2016-06-16 https://bugs.freedesktop.org/show_bug.cgi?id=96675 Stat: 2016-07-15 http://thread.gmane.org/gmane.linux.kernel/2266539/focus=94597 https://bugs.freedesktop.org/show_bug.cgi?id=96675#c11 Note: fix in the works: https://bugs.freedesktop.org/show_bug.cgi?id=96675 Desc: legacy gamma table updates are completely broken for Intel on Linux-4.7-rc7 Repo: 2016-07-12 http://thread.gmane.org/gmane.comp.video.dri.devel/159323/ Stat: 2016-07-14 http://thread.gmane.org/gmane.comp.video.dri.devel/159323/focus=159663 Note: seems https://patchwork.freedesktop.org/patch/89111/ (drm/i915: add missing condition for committing planes on crtc) fixes this == Fixed since last report == Desc: Bad flicker on skylake HQD due to code in the 4.7 merge window Repo: 2016-05-30 http://thread.gmane.org/gmane.linux.kernel/2230377 Stat: 2016-07-08 http://thread.gmane.org/gmane.linux.kernel/2230377/focus=94140 Note: Fixed by http://thread.gmane.org/gmane.linux.kernel/2230377/focus=94140 vswing issue, maybe primary a Firmware problem; a few patches improved situation, but did not fix the problem Desc: Kernel does not boot with 7ed18e2d1b6782989eb399ef79a8cc1a1b583b3c ( acpi-4.7-rc7 aka All of these fix recent regressions in ACPICA, in the ACPI PCI IRQ management code and in the ACPI AML debugger.) Repo: 2016-07-08 https://bugzilla.kernel.org/show_bug.cgi?id=121701 Stat: 2016-07-10 http://thread.gmane.org/gmane.linux.kernel.pci/53279/focus=85652 Note: fixed by https://git.kernel.org/linus/f1b5e4fac164ff43b189d996e4f05f95cc57b984 Desc: ACPI EC problems/ ACPI / EC: Fix an order issue in ec_remove_handlers() Repo: 2016-07-06 http://thread.gmane.org/gmane.linux.kernel/2260279/ Stat: 2016-07-08 http://thread.gmane.org/gmane.linux.kernel/2260279/focus=85583 Note: fixed by https://git.kernel.org/torvalds/c/fa5b4a509d7bbba5d45c8ea177bddfd0b618876a