Since the following kernel commits split slab info from struct page into struct slab, crash cannot get several slab related offsets from struct page. d122019bf061 ("mm: Split slab into its own type") 401fb12c68c2 ("mm: Differentiate struct slab fields by sl*b implementations") 07f910f9b729 ("mm: Remove slab from struct page") Without the patch, "kmem -s|-S" options cannot work correctly with the following errors: crash> kmem -s kmem: invalid structure member offset: page_active FILE: memory.c LINE: 12225 FUNCTION: verify_slab_overload_page() [/usr/bin/crash] error trace: 532526 => 53353a => 5e0a6a => 5e09dc [Detaching after fork from child process 28299] 5e09dc: OFFSET_verify.part.36+92 [Detaching after fork from child process 28301] 5e0a6a: OFFSET_verify+58 [Detaching after fork from child process 28303] 53353a: verify_slab_overload_page+588 [Detaching after fork from child process 28305] 532526: do_slab_chain_slab_overload_page+1171 kmem: invalid structure member offset: page_active FILE: memory.c LINE: 12225 FUNCTION: verify_slab_overload_page() Signed-off-by: xiaer1921 <xiaer1921@xxxxxxxxx> --- memory.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/memory.c b/memory.c index 8448ddc..388b12d 100644 --- a/memory.c +++ b/memory.c @@ -680,6 +680,8 @@ vm_init(void) MEMBER_OFFSET_INIT(slab_s_mem, "slab", "s_mem"); MEMBER_OFFSET_INIT(slab_inuse, "slab", "inuse"); MEMBER_OFFSET_INIT(slab_free, "slab", "free"); + MEMBER_OFFSET_INIT(page_s_mem, "slab", "s_mem"); + MEMBER_OFFSET_INIT(page_active, "slab", "active"); /* * slab members were moved to an anonymous union in 2.6.39. */ @@ -691,6 +693,10 @@ vm_init(void) ANON_MEMBER_OFFSET_INIT(slab_inuse, "slab", "inuse"); if (INVALID_MEMBER(slab_free)) ANON_MEMBER_OFFSET_INIT(slab_free, "slab", "free"); + if (INVALID_MEMBER(page_s_mem)) + ANON_MEMBER_OFFSET_INIT(page_s_mem, "slab", "s_mem"); + if (INVALID_MEMBER(page_active)) + ANON_MEMBER_OFFSET_INIT(page_active, "slab", "active"); } MEMBER_OFFSET_INIT(array_cache_avail, "array_cache", "avail"); -- 2.7.4 --------------B3D587404E53736DF6735F07 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/crash-utility Contribution Guidelines: https://github.com/crash-utility/crash/wiki --------------B3D587404E53736DF6735F07--