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From: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
To: Anderw Morton <akpm@osdl.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Keith Owens <kaos@americas.sgi.com>,
	Dean Nelson <dnc@americas.sgi.com>,
	Tony Luck <tony.luck@intel.com>,
	Ananth Mavinakayanahalli <ananth@in.ibm.com>,
	Prasanna Panchamukhi <prasanna@in.ibm.com>,
	Dave M <davem@davemloft.net>
Subject: [patch 0/6] Notify page fault call chain
Date: Wed, 19 Apr 2006 12:00:59 -0700	[thread overview]
Message-ID: <20060419190059.452500615@csdlinux-2.jf.intel.com> (raw)

Hi Andrew,

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_notification() 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 showed great improvements.

Patches for i386, x86_64, ia64, powerpc and sparc64 follows this mail.

Please apply.

Thanks,
Anil Keshavamurthy

--

             reply	other threads:[~2006-04-19 19:13 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-04-19 19:00 Anil S Keshavamurthy [this message]
2006-04-19 19:01 ` [patch 1/6] Notify page fault call chain for i386 Anil S Keshavamurthy
2006-04-19 19:01 ` [patch 2/6] Notify page fault call chain for x86_64 Anil S Keshavamurthy
2006-04-19 21:07   ` Andi Kleen
2006-04-19 21:25     ` Keshavamurthy Anil S
2006-04-19 19:01 ` [patch 3/6] Notify page fault call chain for ia64 Anil S Keshavamurthy
2006-04-19 19:01 ` [patch 4/6] Notify page fault call chain for powerpc Anil S Keshavamurthy
2006-04-19 19:01 ` [patch 5/6] Notify page fault call chain for sparc64 Anil S Keshavamurthy
2006-04-19 19:01 ` [patch 6/6] Kprobes registers for notify page fault Anil S Keshavamurthy

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