Seven more kdump reboots since my 2026-09-06 comment (#8–#9), all on 7.0.0-31-generic with MGLRU still disabled (lru_gen/enabled → 0x0000). P1 sysctl + THP=never mitigation applied 2026-09-06 did not stop recurrence.
Additionally, two earlier captures from 2026-08-08 were recovered from /var/crash retention when archiving logs on 2026-09-15 (#10–#11). **Burst:** four crashes on 2026-09-13 within ~11 hours (including one with dozens of WARN stack traces from python3 before final Oops at lru_activate). **Tonight (2026-09-15 22:15 JST):** - Oops: page fault at __page_cache_release.part.0+0xac/0x240 - Comm: grok-bot (Cursor/Electron internal thread) - Path: do_madvise → folios_put_refs → __page_cache_release - Boot uptime: ~31 min (1849 s) Recurrence table update (#10–#18): | Date (JST) | Uptime | RIP | Comm | Path hint | |-------------------|----------|-----------------------------|-------------------|------------------| | 2026-08-08 00:30 | ~11.5 h | __page_cache_release+0xac | DedicatedWorker | madvise | | 2026-08-08 13:55 | ~13.4 h | isolate_lru_folios+0x121 | kswapd0 | LRU reclaim | | 2026-09-13 11:51 | ~2.3 h | __page_cache_release+0xac | krita | page cache | | 2026-09-13 16:19 | ~4.4 h | isolate_lru_folios+0x121 | kswapd0 | LRU reclaim | | 2026-09-13 22:34 | ~20 min | lru_activate+0x91 | python3 | after WARN storm | | 2026-09-13 22:59 | ~25 min | __page_cache_release+0xac | tokio-rt-worker | exit_mmap | | 2026-09-14 19:11 | ~6 min | __page_cache_release+0xac | cursor | do_madvise | | 2026-09-14 23:12 | ~4 h | __page_cache_release+0xac | MainThread | exit_mmap | | 2026-09-15 22:15 | ~31 min | __page_cache_release+0xac | grok-bot | do_madvise | Note: six of these nine share the **exact same RIP offset** (+0xac) at __page_cache_release.part.0 — strong evidence of one underlying folio/LRU bug. Hardware unchanged. Not OOM. Full kdump dmesg archived locally (host backup script). Still waiting for 7.0.0-32+ with upstream MGLRU v2 backport. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2162722 Title: general protection fault in lru_gen_del_folio during exit_mmap (ThreadPoolForeg) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2162722/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
