----- "Bob Montgomery" <bob.montgomery@xxxxxx> wrote: > > Dave, > > You are faster than me at fixing crash:-) I was just about to start on > the part for kmem_cache_len_nodes... > > The patch fixes the problem on my example dump which previously said: > ===== > please wait... (gathering kmem slab cache data) > crash: page excluded: kernel virtual address: ffff88022457a000 type: > "kmem_cache_s buffer" > > crash: unable to initialize kmem slab cache subsystem > ===== > > It now says: > ===== > please wait... (gathering kmem slab cache data) > kmem_cache_downsize: SIZE(kmem_cache_s): 872 cache_cache.buffer_size: 384 > kmem_cache_downsize: nr_node_ids: 2 > ===== > Sorry -- I didn't mean to leave the "CRASHDEBUG(0)" in there, so the messages above shouldn't normally be displayed. I'll make it CRASHDEBUG(1) so we'll have a record of it happening if something else comes up in the future. > > In the meantime, I remembered "--zero_exclude", which makes for > a slightly dangerous workaround for the problem. It fills in the > unnecessarily-accessed missing pages with zeros. > > The output of "kmem -s" and "kmem -S" on my problem dump is the > same between your patched version and the old version running > with --zero_exclude. (I don't normally think of using zero_exclude > because it can mask both kernel bugs and makedumpfile bugs...) Yep --zero_excluded masks this problem quite nicely... ;-) > Thanks for making that patch. Is there anything left to > fix in crash ?-) No doubt... Thanks, Dave -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
