Re: [Crash-utility] kmem -[sS] segfault on 2.6.25.17
On Fri, Oct 17, 2008 at 4:04 PM, Dave Anderson <anderson(a)redhat.com> wrote:
Mike,
Apply this patch to 4.0-7.4 and run it on your live system.
It works with the sample vmcore you sent me, and it should also alleviate
many of the errors that I suggested might be due to the underlying
shifting sands of your live system.
I don't know why this is the first report of this, nor why I've never
seen this before? The problem has to do with using invalid entries
in the kmem_cache.nodelists[MAXNUMNODES] array of kmem_list3 data
structures. To date, the unused entries have typically been NULL
for non-existent memory nodes, but not so with your kernel.
Let me know how it works for you.
Hi Dave,
I've tested your patch and crash no longer segfaults. As for the
various errors from "shifting sands"; I still see quite a few "free
list: bad slab pointer:" and "partial list: bad slab pointer:" errors
for my kmem_caches on both the live and vmcore crash sessions.
Are you saying I shouldn't see many of these errors any more? Or are
they still to be expected based on your experience when interacting
with my vmcore?
Thanks for all your help,
Mike