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    Subject[RFC 0/2] ABI for clock_gettime_ns
    Date
    On x86-64, clock_gettime is so fast that the overhead converting to and
    from nanoseconds is non-negligible. clock_gettime_ns is a different
    interface that is potentially faster. If people like the ABI, I'll
    implement an optimized version.

    For the git-inclined, this series is at
    https://git.kernel.org/?p=linux/kernel/git/luto/linux.git;a=shortlog;h=refs/heads/timing/clock_gettime_ns/rfc_v1

    Andy Lutomirski (2):
    Add clock_gettime_ns syscall
    x86-64: Add __vdso_clock_gettime_ns vsyscall

    arch/x86/include/asm/unistd_64.h | 2 +
    arch/x86/vdso/vclock_gettime.c | 70 +++++++++++++++++++++++++++++---------
    arch/x86/vdso/vdso.lds.S | 7 ++++
    include/linux/syscalls.h | 2 +
    kernel/posix-timers.c | 29 ++++++++++++++++
    5 files changed, 94 insertions(+), 16 deletions(-)

    --
    1.7.7.4



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