On (22/11/22 16:07), Petr Vorel wrote: > > On 11. 11. 22 1:48, Sergey Senozhatsky wrote: > > > On (22/11/10 15:29), Martin Doucha wrote: [..] > > > Can you try using /dev/urandom for dd, not /dev/zero? > > > Do you still see zeroes in sysfs output or some random values? > > > After 50 test runs on a kernel where the issue is confirmed, I could not > > reproduce the failure while filling the device from /dev/urandom instead of > > /dev/zero. The test reported compression ratio around 1.8-2.5 which means > > the memory usage reported by mm_stat was 10-13MB. > > Martin, thanks a lot for reruning tests. I wonder problems on /dev/zero is a > kernel bug or just problem which should be workarounded. Hmm. Does CONFIG_KASAN show anything interesting?
