Messages in this thread | | | Date | Sat, 24 Feb 2007 12:01:13 -0800 | From | Markus Gutschke <> | Subject | Re: [PATCH 0/4] coredump: core dump masking support v3 |
| |
David Howells wrote: > How does it work when you can't actually get back to userspace to have > userspace do the coredump? You still have to handle the userspace equivalents > of double/triple faults.
My experience shows that there are only very rare occurrences of situations where you cannot get back into userspace to do the coredump, and the coredumper tries very hard never to cause additional faults.
While I am sure you could construct scenarios where this would happen, realistically the only one I have run into were stack overflows, and they can be handled by carefully setting up an alternate stack for signal handlers -- just make sure the entire stack is already dirtied before you run out of memory (or, turn of overcommitting).
Markus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |