On Sun, Apr 25, 2021 at 03:51:56PM +0800, Kefeng Wang wrote: > we see the PC is at PageLRU, same reason like arm64 panic log, > > "PageBuddy in move_freepages returns false Then we call PageLRU, the macro > calls PF_HEAD which is compound_page() compound_page reads > page->compound_head, it is 0xffffffffffffffff, so it resturns > 0xfffffffffffffffe - and accessing this address causes crash" Oh. I posted patches to fix this back in 2018. https://lore.kernel.org/linux-mm/20180414043145.3953-6-willy@xxxxxxxxxxxxx/ and 2019. https://lore.kernel.org/linux-mm/20190501202433.GC28500@xxxxxxxxxxxxxxxxxxxxxx/ and 2020. https://lore.kernel.org/linux-mm/20200408150148.25290-6-willy@xxxxxxxxxxxxx/ Looks like it's about that time of year for me to try to fix this again. _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
