Qian, Qian Cai <c...@lca.pw> writes: > On Tue, Jun 09, 2020 at 12:20:06AM +0200, Thomas Gleixner wrote: >> Note, that I doubled the size of the stack depot so that we get real >> numbers and not the cutoff by the size limit. IOW, the warning should >> not trigger anymore. If it triggers nevertheless then the numbers will >> still tell us an interesting story. > > Instead of running the whole testsuite, I just picked this single LTP > oom02 test which seems usually trigger it within the testsuite. Let me > know if this is insufficient (which indeed tell the big difference in > "Unique stacks"), and I am happy to run the whole things.
thanks for providing the data. > BAD: next-20200608 > GOOD: next-20200528 (which does not include this series) > > BAD (after boot) > # cat /sys/kernel/debug/stackdepot/info > Unique stacks: 33547 > Depot index: 359 > Depot offset: 6752 > > BAD (after oom02) > # cat /sys/kernel/debug/stackdepot/info > Unique stacks: 140476 That's indeed odd. I try to reproduce and figure out what really breaks here. Thanks, tglx