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authorSeiji Aguchi <seiji.aguchi@hds.com>2013-10-30 16:39:03 -0400
committerH. Peter Anvin <hpa@linux.intel.com>2013-11-08 14:15:49 -0800
commitd34603b07c4255b2b00a546d34f297ccd50ae4c6 (patch)
tree133e7788eb885d11cecc0590184f8825f4c0836f /drivers
parentac7956e2699380b8b10146ec2ba8cbe43a03ff7a (diff)
x86, trace: Add page fault tracepoints
This patch introduces page fault tracepoints to x86 architecture by switching IDT. Two events, for user and kernel spaces, are introduced at the beginning of page fault handler for tracing. - User space event There is a request of page fault event for user space as below. https://lkml.kernel.org/r/1368079520-11015-2-git-send-email-fdeslaur+()+gmail+!+com https://lkml.kernel.org/r/1368079520-11015-1-git-send-email-fdeslaur+()+gmail+!+com - Kernel space event: When we measure an overhead in kernel space for investigating performance issues, we can check if it comes from the page fault events. Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com> Link: http://lkml.kernel.org/r/52716E67.6090705@hds.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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