https://bugzilla.kernel.org/show_bug.cgi?id=201685 Sune Mølgaard (molgaard@xxxxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |molgaard@xxxxxxxxx --- Comment #169 from Sune Mølgaard (molgaard@xxxxxxxxx) --- FWIW, I didn't see any problems with 4.19.0, but see it on all my systems with 4.19.3 and onward (although I *did* skip 4.19.[12]. There fore, I embarked on a git bisect in linux-stable from v4.19 to v4.19.3, which is nearing its end, *so far with every iteration marked GOOD*. Referencing https://www.spinics.net/lists/linux-ext4/msg63498.html (#164), and noting that I usually run kernels from kernel.ubuntu.com/~kernel-ppa/mainline , I did the following: smo@dell-smo:~$ cat /proc/version Linux version 4.19.0-041900-generic (kernel@tangerine) (gcc version 8.2.0 (Ubuntu 8.2.0-7ubuntu1)) #201810221809 SMP Mon Oct 22 22:11:45 UTC 2018 Then, I downloaded 4.19.3 from kernel-ppa, unpacked, and: smo@dell-smo:~/src/deb/foo/boot$ strings vmlinuz-4.19.3-041903-generic |grep 8.2.0 4.19.3-041903-generic (kernel@gloin) (gcc version 8.2.0 (Ubuntu 8.2.0-9ubuntu1)) #201811210435 SMP Wed Nov 21 09:37:20 UTC 2018 BANG, as they say: 8.2.0-9. Whereas git bisect "GOOD"s continuously (as stated, it is not complete - only almost) are not impossible, they certainly don't seem entirely normal, but: sune@jekaterina:~$ gcc --version gcc (Ubuntu 8.2.0-7ubuntu1) 8.2.0 ...on the system where I self-compile during the bisect, *could* explain it. My impression is, that a lot of affected people are on Ubuntu, and I suspect the following: * Many of the affected Ubuntu folks do indeed use kernels from kernel-ppa * Some of those, as well as non-Ubuntu-folks, may have that compiler version for other reasons, and hit the bugs on that account * Bisecting yields inconclusive results, as it seems to do for me, since the Issues is non-kernel. * Theodore T'so and Jens Axboe are unable to reproduce due to unaffected compiler versions, which also explains the no-show in regression tests. Tso, Axboe: With the two of you being completely unable to replicate, could you be enticed to either try GCC 8.2.0-9 (or, possibly, just the packages from the following URLs, and run your regression tests against those? http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.19 (presumed GOOD) http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.19 (presumed BAD) Best regards, Sune Mølgaard -- You are receiving this mail because: You are watching the assignee of the bug.
