linux-toradex.git/arch/x86/include/asm/trace/exceptions.h, branch v3.14.37 Linux kernel for Apalis and Colibri modules x86, trace: Change user|kernel_page_fault to page_fault_user|kernel 2013-11-11T16:15:40+00:00 H. Peter Anvin hpa@zytor.com 2013-11-11T16:15:40+00:00 a4f61dec55c1bdebb84ba77212ebf98f7247736c Tracepoints are named hierachially, and it makes more sense to keep a general flow of information level from general to specific from left to right, i.e. x86_exceptions.page_fault_user|kernel rather than x86_exceptions.user|kernel_page_fault Suggested-by: Ingo Molnar <mingo@kernel.org> Acked-by: Seiji Aguchi <seiji.aguchi@hds.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Link: http://lkml.kernel.org/r/20131111082955.GB12405@gmail.com 
Tracepoints are named hierachially, and it makes more sense to keep a
general flow of information level from general to specific from left
to right, i.e.

	x86_exceptions.page_fault_user|kernel

rather than

	x86_exceptions.user|kernel_page_fault

Suggested-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Seiji Aguchi <seiji.aguchi@hds.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/r/20131111082955.GB12405@gmail.com
x86, trace: Add page fault tracepoints 2013-11-08T22:15:49+00:00 Seiji Aguchi seiji.aguchi@hds.com 2013-10-30T20:39:03+00:00 d34603b07c4255b2b00a546d34f297ccd50ae4c6 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> 
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>