Re: [Crash-utility] kmem -s issue (gdb can't get offest of struct page lru member)

> > crash> struct page.lru > struct: invalid data structure reference: page.lru > > Any idea why we do not get the offset from gdb? > Perhaps a problem with the anonymous union? Right -- it's due to commit 49e2258586b423684f03c278149ab46d8f8b6700, which moved the page.lru field into an anonymous structure: /* Third double word block */ - struct list_head lru; /* Pageout list, eg. active_list + union { + struct list_head lru; /* Pageout list, eg. active_list * protected by zone->lru_lock ! */ + struct { /* slub per cpu partial pages */ + struct page *next; /* Next partial slab */ +#ifdef CONFIG_64BIT + int pages; /* Nr of partial slabs left */ + int pobjects; /* Approximate # of objects */ +#else + short int pages; + short int pobjects; +#endif + }; + }; And see https://www.redhat.com/archives/crash-utility/2012-January/msg00023.html for the gdb-related details. Can you try a patch like this to vm_init(): MEMBER_OFFSET_INIT(page_lru, "page", "lru"); + if (INVALID_MEMBER(page_lru)) + ANON_MEMBER_OFFSET_INIT(page_lru, "page", "lru");