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    Subject[PATCH 1/4] Alter the amount of steal time reported by the guest.
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    Date
    Modify the amount of stealtime that the kernel reports via the /proc interface.
    Steal time will now be broken down into steal_time and consigned_time.
    Consigned_time will represent the amount of time that is expected to be lost
    due to overcommitment of the physical cpu or by using cpu hard capping.

    Signed-off-by: Michael Wolf <mjw@linux.vnet.ibm.com>
    ---
    fs/proc/stat.c | 9 +++++++--
    include/linux/kernel_stat.h | 1 +
    2 files changed, 8 insertions(+), 2 deletions(-)

    diff --git a/fs/proc/stat.c b/fs/proc/stat.c
    index e296572..cb7fe80 100644
    --- a/fs/proc/stat.c
    +++ b/fs/proc/stat.c
    @@ -82,7 +82,7 @@ static int show_stat(struct seq_file *p, void *v)
    int i, j;
    unsigned long jif;
    u64 user, nice, system, idle, iowait, irq, softirq, steal;
    - u64 guest, guest_nice;
    + u64 guest, guest_nice, consign;
    u64 sum = 0;
    u64 sum_softirq = 0;
    unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
    @@ -90,10 +90,11 @@ static int show_stat(struct seq_file *p, void *v)

    user = nice = system = idle = iowait =
    irq = softirq = steal = 0;
    - guest = guest_nice = 0;
    + guest = guest_nice = consign = 0;
    getboottime(&boottime);
    jif = boottime.tv_sec;

    +
    for_each_possible_cpu(i) {
    user += kcpustat_cpu(i).cpustat[CPUTIME_USER];
    nice += kcpustat_cpu(i).cpustat[CPUTIME_NICE];
    @@ -105,6 +106,7 @@ static int show_stat(struct seq_file *p, void *v)
    steal += kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
    guest += kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
    guest_nice += kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
    + consign += kcpustat_cpu(i).cpustat[CPUTIME_CONSIGN];
    sum += kstat_cpu_irqs_sum(i);
    sum += arch_irq_stat_cpu(i);

    @@ -128,6 +130,7 @@ static int show_stat(struct seq_file *p, void *v)
    seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
    seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
    seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
    + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(consign));
    seq_putc(p, '\n');

    for_each_online_cpu(i) {
    @@ -142,6 +145,7 @@ static int show_stat(struct seq_file *p, void *v)
    steal = kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
    guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
    guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
    + consign = kcpustat_cpu(i).cpustat[CPUTIME_CONSIGN];
    seq_printf(p, "cpu%d", i);
    seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user));
    seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice));
    @@ -153,6 +157,7 @@ static int show_stat(struct seq_file *p, void *v)
    seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
    seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
    seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
    + seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(consign));
    seq_putc(p, '\n');
    }
    seq_printf(p, "intr %llu", (unsigned long long)sum);
    diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
    index 66b7078..e352052 100644
    --- a/include/linux/kernel_stat.h
    +++ b/include/linux/kernel_stat.h
    @@ -28,6 +28,7 @@ enum cpu_usage_stat {
    CPUTIME_STEAL,
    CPUTIME_GUEST,
    CPUTIME_GUEST_NICE,
    + CPUTIME_CONSIGN,
    NR_STATS,
    };



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