Messages in this thread | | | From | Pasha Tatashin <> | Date | Sat, 27 Nov 2021 14:48:00 -0500 | Subject | Re: [PATCH 2/3] mm: page table check |
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On Sat, Nov 27, 2021 at 3:41 AM Fusion Future <qydwhotmail@gmail.com> wrote: > > It seems after updating to linux-next-20211125, my system is crashing > frequently due to "kernel BUG at mm/page_table_check.c:101".
Thank you for reporting this issue:
99 if (anon) { 100 BUG_ON(atomic_read(&ptc->file_map_count)); 101 BUG_ON(atomic_dec_return(&ptc->anon_map_count) < 0);
This BUG_ON checks that during unmap anon map counter (cleared in ptep_clear_flush()) does not become negative. If it becomes negative it means that we missed accounting for this anon mapping during set_pte(). Is there a config and environment that I could use to repro this problem?
Thank you, Pasha
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