On 01/26/2014 04:22 PM, Ingo Molnar wrote:
* Qiaowei Ren <qiaowei....@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....@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?
It will be only once per startup.
Thanks,
Qiaowei
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