Re: [PATCH v3] mm/gup: check page posion status for coredump.

On Sat, 20 Mar 2021 00:35:16 + Matthew Wilcox wrote: > On Fri, Mar 19, 2021 at 10:44:37AM +0800, Aili Yao wrote: > > +++ b/mm/gup.c > > @@ -1536,6 +1536,10 @@ struct page *get_dump_page(unsigned long addr) > > FOLL_FORCE | FOLL_DUMP | FOLL_GET); > > if (l

Re: [PATCH v3] mm/gup: check page posion status for coredump.

On Fri, Mar 19, 2021 at 10:44:37AM +0800, Aili Yao wrote: > +++ b/mm/gup.c > @@ -1536,6 +1536,10 @@ struct page *get_dump_page(unsigned long addr) > FOLL_FORCE | FOLL_DUMP | FOLL_GET); > if (locked) > mmap_read_unlock(mm); > + > + if (ret

[PATCH v3] mm/gup: check page posion status for coredump.

When we do coredump for user process signal, this may be an SIGBUS signal with BUS_MCEERR_AR or BUS_MCEERR_AO code, which means this signal is resulted from ECC memory fail like SRAR or SRAO, we expect the memory recovery work is finished correctly, then the get_dump_page() will not return the erro