Hi, I work for Montavista (Cavium Inc) as a Technical Lead . I want to push some of the kernel patches to rt community (2.6.32 kernel 2.6.33 rt patch) , so that It will go to the main line These patches are reviewed and approved by our system Architect. I request you to include in the main line . These issues were reported by our customer CISCO. Problem Description: If kprobes is enabled along with kgdb, kgdb gives a SIGHUP on the host side. Root Cause: Inside the do_page_fault() (arch/mips/mm/fault.c) there is a call to notify_die() when kprobes is enabled. When kgdb is enabled the register_die_notifier() handler catches this exception (which is 3 - TLB miss on store) and says it does not know it and returns it as a SIGHUP. How Solved: Made kgdb ignore this particular die notification (cmd == DIE_PAGE_FAULT) in its handler. I request you to include the above patch in to the main line kernel . If any questions please contact me at sshaiju@xxxxxxxxxx (shaiju_sada@xxxxxxxxx) Regards, Shaiju.
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4995-kgdb-Ignore-DIE_PAGE_FAULT-event-in-notify-handler.patch
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