On Tue, 12 Dec 2023 16:25:29 +0100 Igor Mammedov <imammedo@xxxxxxxxxx> wrote: > On Tue, 12 Dec 2023 13:50:20 +0100 > Fiona Ebner <f.ebner@xxxxxxxxxxx> wrote: > > > Am 12.12.23 um 12:26 schrieb Igor Mammedov: > > > > > > it's not necessary, but it would help to find out what's going wrong faster. > > > Otherwise we would need to fallback to debugging over email. > > > Are you willing to help with testing/providing debug logs to track down > > > the cause?. > > > > > > > I submitted the dmesg logs in bugzilla: > > https://bugzilla.kernel.org/show_bug.cgi?id=218255 > > > > > Though debug over email would be slow, so our best option is to revert > > > offending patches until the cause if found/fixed. > > > > > >>>>> Do you have to revert both cc22522fd55e2 and 40613da52b13f to make it > > >>>>> work reliably? If we have to revert something, reverting one would be > > >>>>> better than reverting both. > > >>>> > > >> > > >> Just reverting cc22522fd55e2 is not enough (and cc22522fd55e2 fixes > > >> 40613da52b13f so I can't revert just 40613da52b13f). > > > > > > With UEFI setup, it still works for me fine with current master. > > > > > > Kernel 6.7.0-rc5-00014-g26aff849438c on an x86_64 (ttyS0) > > > > > > > I also built from current master (still 26aff849438c) to verify and it's > > still broken for me. > > > > > > > > it still doesn't work with Fedora's 6.7.0-0.rc2.20231125git0f5cc96c367f.26.fc40.x86_64 kernel. > > > However it's necessary to have -smp 4 for it to break, > > > with -smp 1 it works fine as well. > > > > > > > For me it's (always with build from current master): > > > > -smp 1 -> it worked 5 times out of 5 > > -smp 2 -> it worked 3 times out of 5 > > -smp 4 -> it worked 0 times out of 5 > > -smp 8 -> it worked 0 times out of 5 > > > I managed to reproduce it with upstream using fedora 40 config as is > (without converting it to mod2yesconfig). > So give me a couple of days to debug it before reverting. Actually here is another report + analysis explaining where the race is happening: https://www.spinics.net/lists/kernel/msg5033061.html That's the reason why my minimal config worked (based on defconfig where CONFIG_SCSI_SCAN_ASYNC in not enabled by default for x86) While distros (at least some) do enable it. > > > > > Best Regards, > > Fiona > > >
