Messages in this thread | | | Date | Sun, 26 Jan 2014 09:22:01 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH v3 3/4] x86, mpx: add prctl commands PR_MPX_INIT, PR_MPX_RELEASE |
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* Qiaowei Ren <qiaowei.ren@intel.com> wrote:
> This patch adds the PR_MPX_INIT and PR_MPX_RELEASE prctl() > commands on the x86 platform. These commands can be used to > init and release MPX related resource. > > A MMU notifier will be registered during PR_MPX_INIT > command execution. So the bound tables can be automatically > deallocated when one memory area is unmapped. > > Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com> > --- > arch/x86/Kconfig | 4 ++ > arch/x86/include/asm/mpx.h | 9 ++++ > arch/x86/include/asm/processor.h | 16 +++++++ > arch/x86/kernel/mpx.c | 84 ++++++++++++++++++++++++++++++++++++++ > include/uapi/linux/prctl.h | 6 +++ > kernel/sys.c | 12 +++++ > 6 files changed, 131 insertions(+), 0 deletions(-)
Hm. What is the expected typical frequency of these syscalls for a larger application like a web browser? Only once per startup typically, or will they be called more frequently?
Thanks,
Ingo
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