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Anil S Keshavamurthy 1bd858a507 [PATCH] Notify page fault call chain for x86_64 ... Currently in the do_page_fault() code path, we call notify_die(DIE_PAGE_FAULT, ...) to notify the page fault. Since notify_die() is highly overloaded, this page fault notification is currently being sent to all the components registered with register_die_notification() which uses the same die_chain to loop for all the registered components which is unnecessary. 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 showed great improvements. And the kprobes which is interested in this notifications, now registers onto this new call chain only when it need to, i.e Kprobes now registers for page fault notification only when their are an active probes and unregisters from this page fault notification when no probes are active. I have incorporated all the feedback given by Ananth and Keith and everyone, and thanks for all the review feedback. This patch: Overloading of page fault notification with the notify_die() has performance issues(since the only interested components for page fault is kprobes and/or kdb) and hence this patch introduces the new notifier call chain exclusively for page fault notifications their by avoiding notifying unnecessary components in the do_page_fault() code path. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		19 years ago
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boot	[PATCH] vesafb: Fix incorrect logo colors in x86_64	19 years ago
crypto	[CRYPTO] aes: Fixed array boundary violation	19 years ago
ia32	[PATCH] sys_move_pages: 32bit support (i386, x86_64)	19 years ago
kernel	[PATCH] make pmtmr_ioport __read_mostly	19 years ago
lib	[PATCH] x86_64: remove dead do_softirq_thunk	19 years ago
mm	[PATCH] Notify page fault call chain for x86_64	19 years ago
oprofile	[PATCH] Move Kprobes and Oprofile to "Instrumentation Support" menu	20 years ago
pci	[PATCH] PCI: fix issues with extended conf space when MMCONFIG disabled because of e820	19 years ago
Kconfig	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	19 years ago
Kconfig.debug	[PATCH] x86_64: Remove CONFIG_INIT_DEBUG	19 years ago
Makefile	[PATCH] x86_64: fix CONFIG_REORDER	19 years ago
defconfig	[PATCH] x86_64: Update defconfig	19 years ago