[(resend)patch 0/7] Notify page fault call chain
From: Anil S Keshavamurthy
Date: Wed Apr 19 2006 - 18:32:20 EST
Currently in the do_page_fault() code path, we call
notify_die(DIE_PAGE_FAULT, ...) to notify the page fault.
The only interested components for this page fault
notifications are Kprobes and/or kdb. Since
notify_die() is highly overloaded, this page fault
notification is currently being sent to other
components registered with register_die_notifier()
which uses the same die_chain to loop for all
the registered components.
In order to optimize the do_page_fault() code path,
this critical page fault notification is now moved
to different call chain and the test results conducted
by Robin Holt showed great improvements.
Patches for i386, x86_64, ia64, powerpc and sparc64 follows this mail.
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